Real-life version: My girlfriend's younger sister is a big-breasted, mini-skirted, devilish schoolgirl (MIMK-148)

He unexpectedly encounters her younger sister, Ms. Sakurai, whom he had met once before, on the street. She (the older sister) is completely different, possessing enormous breasts and an extremely seductive miniskirt... If a female student had a figure like that, it would be like being trapped in a ghost's maze! The protagonist, treated as a pervert by such a beauty, is forced to go to a love hotel to prove his innocence, but... there, the initial interrogation becomes unbearable...! Lewd language, foot fetish, breast fetish, and sexual intercourse. Under the unbearable onslaught of eroticism, his rationality crumbles! "You wretched older brother, may all your vile sperm be wiped out~ Pfft~ Pfft~"