Boku no Kanojo ga Eroi Wake

A college student named Shishigami finds himself in an unexpected situation when three women become sexually involved with him. His schoolmate, known as Pochi, is the first, followed by her friend Mike, and finally his young landlady, Tama. The three women, who are also his girlfriends, start living with him. While managing the demands of three partners is challenging, Shishigami does not mind since his sexual needs are consistently met.