[FJIN-073] A full week of nonstop erections and semen draining with the unfriendly big-assed older sister next door. Mizukawa Jun

The protagonist suffers from priapism (a condition of persistent erections) and ends up breaking both his arms by constant fapping.

His unexpected ally is the voluptuous and tsundere landlady from next door: Jun.

Though she complains, she agrees to relieve him upon seeing that is an actual medical necessity. Not without moaning about it with a pissy attitude that only manages to excite the young protagonist even more…