The leading character is a virgin, reserved, 'otaku'. His work is home security.By strange accident, his father remarried and he got a new family....My sister-in-law looks at me really coldly.However, I am panting and suffering with mental anguish over the sister-in-law in my new family.I couldn't stand it anymore so I decided to do night-crawling on __/__/20__.If I am found out she will look at me even more harshly, and treat me as sheer waste.I need to have sex with her without being found out.** Hiyori Tachibana B70/W52/H76 Small-titted virginMy sister-in-law always berates me, saying 'you are disgusting! Dirty!Her tone is harsh, but at least she calls me 'bro'.*'Huh!! Bro you are disgusting!' (C.V White night AK)