Yeh Un Dinon Ki Baat Hai

Yeh Un Dinon Ki Baat Hai is a Hindi coming of age romantic period drama television series produced by Shashi Sumeet Productions. It aired on Sony TV. It stars Ashi Singh and Randeep Rai as Naina Agarwal and Sameer Maheshwari. Set in the 1990s, it is inspired by the real-life love story of producers Shashi and Sumeet Mittal. It received a positive response from critics and audiences with praise for its performances and script.

After announcing that the show would end, Sony TV announced that the show would return with a second season.

Plot
Set in 1990 in Ahmedabad, Naina Agarwal is a 16-year-old girl studying at Pragati Vidya Ka Mandir. She had lost her mother at birth and is raised by uncle Anand and Bela in a conservative joint family. Naina's father, Rakesh Agarwal, a librarian at her school, has an orthodox mindset, supporting only his son Arjun's dream, and neglecting Naina. Meanwhile, in Nainital, Sameer Maheshwari, a 17-year-old, gets suspended from his boarding school and returns to his maternal grandfather, Jaiprakash Maheshwari, in Ahmedabad. Sameer has a bitter relationship with his mother, Vishaka, who married Vivek Somani and moved to Delhi after Sameer's father died. Sameer joins his cousin, Munna's school as his classmate, where Naina also studies. Naina falls for Sameer at first sight.

Sameer decides to avenge Rakesh and Naina, who misunderstand him. He bets with the seniors that he'll make Naina say "I Love You" and tries to woo her and they pursue a relationship. During the school trip at Mount Abu, Naina confesses her feelings to Sameer, but is left heartbroken learning about the bet and decides to move on. Sameer apologizes to Naina after Munna and Pandit convince him. Naina breaks down and refuses to forgive him. Sameer finally realizes his love for Naina. Soon, Arjun discovers about the bet and confronts Sameer, who accidentally pushes him down the stairs, breaking his leg. As punishment, Sameer is asked to serve Arjun at his home during his recovery. Eventually, he manages to win everyone's hearts. Naina finally forgives Sameer after seeing his efforts and they confess their love to each other.

After his grandfather's demise, Sameer moves to Delhi, reconciles with Vishaka and bonds with his step-siblings, Deepika and Rohan. The couple continue their long-distance relationship through phone calls and letters. Shanti, Naina's class teacher, finds out about her relationship with Sameer and warns her against compromising her studies. While Naina tops the exams again, Sameer joins a radio station as a programmer. However, he starts considering himself unlucky for his loved ones due to his step-grandmother's harsh taunts. He tries to disconnect from Naina but Vishaka sends him back to Ahmedabad seeing his depression. Meanwhile, Naina celebrates farewell at her school.

Naina enrolls in VJN College and makes Sameer realize that his assumptions are wrong. After seeing the consequences of Arjun and Shefali's relationship with her family, Naina breaks up with Sameer. Soon, her marriage is fixed to an arrogant CA, Sharad. Sameer and Naina decide to remain friends to preserve their happy memories. Naina breaks the alliance because of Sharad's violent behavior towards Anand, who gets to know about Sameer and Naina's relationship and approves of it after seeing Sameer's true love for Naina. Sameer and Naina rekindle their relationship in college and but get caught red-handed by the Agarwals. Rakesh tries to get Naina forcefully married off to Sharad. Sameer and Naina elope with help of their friends and hide until Anand's return. On the other hand, Anand arrives, misunderstands the situation, and is furious at Naina and Sameer, but is eventually mollified.

Sameer and Naina's marriage is fixed. The Agarwal family, too, gets broken as Naresh and Beena disapprove of the alliance despite Anand and Bela's constant requests. Naresh blackmails Rakesh not to attend Naina's wedding. But the couple finally marries with the help of friends and the remaining family.

Sameer and Naina start living in a separate bungalow which he had bought for her. Reality hits when the differences in their lifestyles and mindsets creates clashes. Sameer's uncle, Kamlesh kicks him out of the family business. Sameer realizes his acting potential, after acting for an advertisement. They sell their house and move to Mumbai with Rakesh. After many financial and career struggles in Mumbai, Naina realises her potential to take up writing, which Sameer supports. They present their first story to Aruna Irani who telecasts their serial, which runs successfully.

Naina gives birth to their daughter, Suman. After two years, Sameer buys back his old bungalow in Ahmedabad for Naina. They return to Ahmedabad and reconcile with their family members who had turned into foes during their marriage. Naina, Sameer, and their friends reunite at their school's 50th anniversary and reminisce their old days. The story concludes happily in 1998, with Naina and Sameer succeeding in their careers and life.

Main

 * Ashi Singh as Naina Agarwal Maheshwari – Rakesh and Rama's daughter; Bela and Anand's daughter-figure; Arjun's sister; Pooja, Preeti and Pralay's cousin; Sameer's wife; Suman's mother (2017–19)
 * Randeep Rai as Sameer Maheshwari – Vishakha's son; Vivek's step-son; Deepika's half-brother; Rohan's step-brother; Munna and Devang's cousin; Munna and Pandit's best friend; Naina's husband; Suman's father (2017–19)

Recurring

 * Ayesha Kaduskar as Preeti Agarwal – Anand and Bela's younger daughter; Pooja's sister; Arjun, Naina and Pralay's cousin; Shubham's wife (2017–19)
 * Sanjay Choudhary as Manoj "Munna" Dhawan – Sameer's cousin; Sameer and Pandit's friend; Rewa's husband (2017–19)
 * Raghav Dhir as Pushpendra "Pandit" Kapoor – Sameer and Munna's friend (2017–19)
 * Chandresh Singh as Rakesh Agarwal – Naresh and Anand's brother; Rama's widower; Naina and Arjun's father; Suman's grandfather (2017–19)
 * Sachin Khurana as Anand Agarwal – Rakesh and Naresh's brother; Bela's husband; Pooja and Preeti's father; Naina's father-figure (2017–19)
 * Madhusree Sharma as Bela Agarwal – Anand's wife; Preeti and Pooja's mother; Naina's mother-figure (2017–19)
 * Abha Parmar as Beena Agarwal – Juhi's aunt; Naresh's wife; Pralay's mother (2017–19)
 * Sanjay Batra as Naresh Agarwal – Rakesh and Anand's brother; Beena's husband; Pralay's father (2017–19)
 * Kristina Patel as Swati Srivastava – Naina's best friend; Munna's former love interest (2017–19)
 * Kiara Bhanushali as Suman Maheshwari – Sameer and Naina's daughter (2019)
 * Somendra Solanki / Vivaan Singh Rajput as Arjun Agarwal – Rakesh and Rama's son; Naina's brother; Pooja, Preeti and Pralay's cousin; Shefali's former love interest; Juhi's husband (2017–18) / (2018–19)
 * Nidhi Bhavsar as Juhi Agarwal – Beena's niece; Arjun's wife (2018–19)
 * Hema Sood as Shefali Victor – Naina's pen friend; Arjun's former love interest (2017–18)
 * Aditya as Prateek "Pralay" Agarwal – Naresh and Beena's son; Arjun, Pooja, Naina and Preeti's cousin (2017–18)
 * Malina Kumra as Kamya – Naina's former nemesis turned friend (2017–19)
 * Hema Sai as Hema – Naina's former nemesis turned friend (2017–19)
 * Shweta Rajput as Pooja Agarwal Garg – Anand and Bela's elder daughter; Preeti's sister; Arjun, Naina and Pralay's cousin; Varun's wife (2017–19)
 * Love Joshi as Varun Garg – Neeli's brother; Pooja's husband (2017–18)
 * Kiran Kumar as Jaiprakash Dinanath Maheshwari – Vishaka's father; Sameer and Deepika's grandfather; Rohan's step-grandfather; Suman's great-grandfather (Dead) (2017–18)
 * Unknown as Leela Maheshwari - Vishaka's mother; Sameer and Deepika's grandmother; Rohan's step-grandmother; Suman's great-grandmother (2019) (episode 353)
 * Vaishnavi Mahant as Vishakha Maheshwari Somani – Jaiprakash's daughter; Kamlesh's cousin; Vivek's wife; Sameer and Deepika's mother; Rohan's step-mother; Suman's grandmother (2017–19)
 * Jayshree T. as Phulla Bua – Arjun, Pooja, Naina, Preeti and Pralay's grand-aunt (2018–19)
 * Ahsaan Qureshi as U.P Pandey – Principal of Pragati Vidya Ka Mandir (2017–18)
 * Rishina Kandhari as Ms. Shanti – Maths teacher of Pragati Vidya Ka Mandir; Naina's teacher and mentor (2017–18)
 * Melanie Nazareth as Prabha Maheshwari – Kamlesh's wife; Devang's mother; Sameer's aunt (2018–19)
 * Rajendra Chawla as Kamlesh Maheshwari – Vishaka's cousin; Prabha's husband; Devang's father; Sameer's uncle (2018–19)
 * Atul Verma as Devang Maheshwari – Kamlesh and Prabha's son; Sameer's cousin; Poonam's husband (2018–19)
 * Subuhi Joshi as Poonam Maheshwari – Devang's wife (2018–19)
 * Vikas Tripathi as Shubham – Nirmala's son; Tanvi's brother; Preeti's husband (2019)
 * Kanchan Gupta as Nirmala – Shubham and Tanvi's mother (2019)
 * Ruchita Vijay Jadhav as Vanita – Jatin's wife; Sameer and Naina's neighbour and Society secretary (2019)
 * Devang Taana as Jatin – Shibhani's brother; Vanita's husband; Naina and Sameer's neighbour (2019)
 * Urvi Vyas as Shibhani – Jatin's sister (2019)
 * Nishi Singh as Sunaina Parekh – Naina and Sameer's nemesis at college (2018)
 * Hitesh Sharma as Kartik Dholakia – Sameer and Naina's nemesis at college (2018)
 * Meghan Jadhav as Aditya Gadkari – Gauri and Gopal's son; Sameer's brotherly friend; Tanvi's husband (2019)
 * Tarjanee Bhadla as Tanvi Gadkari – Nirmala's daughter; Shubham's sister; Aditya's wife (2019)
 * Manoj Kolhatkar as Gopal Gadkari – Naina and Sameer's neighbor; Gauri's husband; Aditya's father (2019)
 * Anuradha as Gauri Gadkari – Gopal's wife; Aditya's mother (2019)
 * Sheetal Maulik as Sejal Gadkari – Aditya's sister-in-law (2019)
 * Sandeep Rajora as Vivek Somani – Vishaka's husband; Rohan and Deepika's father; Sameer's step-father; Suman's step-grandfather (2017–19)
 * Kitu Gidwani as Mrs. Somani – Vivek's mother; Rohan and Deepika's grandmother; Sameer's step-grandmother (2018)
 * Rohit Chandel as Rohan Somani – Vivek's son; Vishaka's step-son; Deepika's half-brother; Sameer's step-brother (2018)
 * Riddhima Taneja as Deepika Somani – Vivek and Vishaka's daughter; Sameer and Rohan's half-sister (2018)
 * Manika Mehrotra as Rinki – Naina and Preeti's cousin (2018–19)
 * Prachi Joshi as Rewa – Munna's wife (2019)
 * Rushad Rana as Lochan Sir – Ex-drama teacher turned principal in Pragati Vidya Ka Mandir (2017–19)
 * Guddi Maruti as VJN college Principal (2018)
 * Rashika Singh as Neeli Madhumakkhi – Varun's sister (2018)
 * Devarshi Shah as Raghav aka Ameer Maheshwari – Naina's fake husband (2019)
 * Vishnu Sharma as Jayesh Bhoummik Raval aka JBR – Accounts teacher of VJN college (2018)
 * Arjun Aneja as Farhan Poonawala – Teacher appointed for college play rehearsals, Preeti's crush(2018)
 * Vikram Singh Rathod as Sanjay Tibriwal – Naina admirer and classmate at school (2017)
 * Nirbhay Shukla as Vicky – Kartik's friend; Naina and Sameer's senior (2018)
 * Vaibhav Shrivastav as Priyank – Kartik's friend; Naina's rival (2018)
 * Sejal Sharma as Dimple – Vicky's classmate and Sameer's admirer (2018)
 * Charu Trikha as Mitali – Rival gang's member at college; Pandit's former crush(2018)
 * Garima Joshi as Sahiba – Sameer and Naina's neighbor (2019)
 * Paras Priyadarshan as Sharad – Naina's proposed groom (2018)
 * Simran Lulla as Amrita Khanna – Sameer's neighbour and friend in Delhi (2018)
 * Vipul Deshpande as Bakshi – Naina's boss.

Guests

 * Kumar Sanu (2018)
 * Anant Mahadevan
 * Aruna Irani (2019)

Voiceover

 * Sadiya Siddiqui as Naina's Voiceover
 * Jiten Lalwani as Sameer's Voiceover

Soundtrack
The opening theme of Yeh Un Dinon Ki Baat Hai was composed by Anu Malik. The lyrics were written by Sanjay Chhel. It was sung by Kumar Sanu and Sadhana Sargam. The song was known for its melodious lyrics, which recall happenings in the 1990s.

Reception
It was mainly hailed for its fresh outlook and for bringing out nostalgia and flavours of the 90s. It topped Sony TV shows by gaining a TRP of 1.5 in its first week.

The Times of India hailed it as one of the best TV shows launched in 2017 and praised the performances of newcomers Ashi Singh and Randeep Rai .

The UK's weekly Asian newspaper Eastern Eye praised the creative team of the show for leaving no stone unturned to recreate the city of Ahmedabad from an earlier era, calling it a tribute to the city.

This show has earned compliments from various television and film actors.