[STARS-746] The Worst Annoying Apparel Clerk Who Looked Down On Me, Was Confined To A Dirty Room! Aphrodisiac And All-you-can-eat Creampie Training Mahiro Yui

The protagonist is an introverted type who struggles even with basic tasks.

One day, and with much difficulty, he goes out clothes shopping, but the store clerk Yui Mahiro brutally destroys him with some hurtful remarks.

He then is hellbent on revenge and wants to destroy her too, with creampie.