Ai wa Kagi no Kazu dake... Fuuzoku Mansion  

Ai ha Kagi no Kazu dake... Fuuzoku Mansion, 愛は鍵の数だけ… 風俗マンション

Jyun finds himself living independently for the very first time, with his dad having departed abroad in pursuit of fresh employment opportunities. As he settles into a new apartment complex, Jyun takes up the role of assistant manager. However, during his tenure at this property, he comes across an unexpected revelation: the building turns out to be a haven for adult entertainment services.