Rule Ihan wa Iku made H!?: Osananajimi to Doukyo Hajimemashita

Yuki starts to live on her own when she starts working, but, there has been a mistake in contract, so she ended up living with her childhood friend, Keita. They don't get along very well, so they made some house rules, but Yuki has no idea the penalty for breaking a rule is so naughty!
(Source: Coolmic)