A long-standing complicated relationship between Kaishin and Moe that began in college. Despite their frequent arguments, their bond runs deep, and though they're both aware of their feelings, neither can bring themselves to be honest, letting time slip by. Then one day, Kaishin tells Moe, "Let's stop being friends," leaving her shaken after a history of failed romances, unable to respond. At that moment, Kaishin shows up at Moe's place, claiming his bathroom is broken. What lies ahead for them? Here begins the instant that will drastically change their relationship forever.