Junai LOCK!

Yuki, who believed in the phrase "Yuki is the best," enjoyed a romantic week with Seiichi, a bartender at a disco. Soon after, multiple women appeared, each claiming to be Seiichi's girlfriend, causing Yuki's happiness to fade into despair. Faced with the possibility of losing him, she takes the handcuffs from her detective father and takes an unexpected step to secure Seiichi for herself.