Kishiwada is renowned as a skilled fighter at his school, but his nipples are his Achilles heel. They are incredibly sensitive and any physical contact leaves him weak-kneed and aroused. This peculiar predicament resulted from his childhood friend's earlier teasing. His friend, Andou, has returned and is causing more trouble for Kishiwada. Andou is in love with Kishiwada, but he refuses to acknowledge that fact. To add to Kishiwada's troubles, a stalker also emerges from his past, who also harbours feelings for him.
