Synopsis: Ane-san Countdown!

Riko Umekita, a young student, faces a major upheaval in her life after a daunting encounter with the most frightening boy in her class, Saruwada-kun. Born into a family with a long tradition of Yakuza, Saruwada commands both respect and fear. Reluctantly, Riko agrees to accompany him home, where she unexpectedly encounters her own parents. In a surprise move, Saruwada-kun proposes marriage to Riko, leaving her with one simple question: what is going on?