On the surface, he's the babysitter for the boss's only daughter Yaeka, but Kirishima is really a member of the yakuza by trade. Thanks to Kirishima's persuasion, Yaeka finally resolves to visit her mother in the hospital, where she shares the feelings she's built up over the past three years.

Join this unlikely pair as they make Valentine's chocolates with the gluttonous high school girl Ayumu, become reunited with Kirishima's own former babysitter, and even meeting Yaeka's first friend!