Mubō na Yume wa Sameru Koto ga Nai

"Mubō na Yume wa Sameru Koto ga Nai" (無謀な夢は覚めることがない) is the third single by Japanese idol group STU48, released on January 29, 2020. Yumiko Takino served as lead performer for the title song. It topped the Japanese music charts in its release week.

Production and release
The title song music video was recorded at the Chichibugahama beach in Kagawa Prefecture, also known as the "Seto Inland Sea Sky Mirror", (瀬戸内海の天空の鏡) and Ushimado Olive Land in Okayama Prefecture. It features the group's most intense dance routine at the time, choreographed by Tomohiko Tsujimoto, who had previously worked with the group on "Kaze wo Matsu". The song was performed live for the first time during the STU48 concert at the Tokyo Dome City Hall on January 18, 2020.

The single was released in four editions, seven including Limited Editions. B-side "Bokura no Shunkashūtō" (僕らの春夏秋冬) is the first appearance in a single of the group's second generation trainees, who debuted in December 2019. "Setouchi no Imōto" (瀬戸内の妹) was the theme song for a commercial for Hiroshima Telecasting's Bridal Information Center and performed by members who appeared in the ad. "Kiseki to iu Na no Story" (奇跡という名のストーリー) was created for the group's second original stage set list "Bokutachi no Koi no Yokan" and performed by all full members (excluding trainees).

Reception
"Mubō na Yume wa Sameru Koto ga Nai" sold 333,000 copies in its release week according to Billboard Japan and placed first on both the Oricon Singles and Billboard Japan Hot 100 charts.