Other names:
Rule Ihan wa Iku made H!? Osananajimi to Doukyo Hajimemashita / A Secret Penalty I Started to Live with My Childhood Friend / Phá Vỡ Mọi Quy Tắc / Phá Vỡ Những Quy Tắc Chúng Ta Cần Những Gì!?! / Rul'eul Wi'banha'myeon Jeoljeongggaj
Yuki decided to live alone when she got a job. However due to a mistake in the contract she has to live with Keita, her childhood friend! The two of them then established a set of rules for their cohabitation life together but there's a penalty if one break the rules! What's the penalty?!
