A brother-in-law who temporarily lives at his parents' house after the company he worked for went bankrupt. His younger brother, who lives in his parents' house, is sarcasm and has a narrow shoulder, but his younger brother's wife, Momoka, treats him warmly. A brother-in-law who is attracted to such Momoka will commit unbearably! Momoka resists, but opens her heart to her brother-in-law's earnest thoughts. On a tropical night, the two are sweaty and violently chasing each other.