In a world where same-sex marriage is legal, 28-year-old bachelor Mashiro Kotobuki has built a reputation as a top-notch matchmaker at Mari's, a leading marriage agency. Despite his knack for helping others find love, Mashiro actually has no romantic experience of his own! The CEO, his mother, is constantly on his case about settling down. One day, Kaede Narita, his average Joe coworker, walks in during a nagging session and—out of desperation—Mashiro blurts out that they're dating! Mashiro is then left on the fence when he is offered the chance to head a new same-sex marriage agency if he can actually tie the knot. From there, the two pretend to be in a chaotic "fake marriage," but it appears that Kaede is hiding something...

One day, high-school student Hanamoto is called out by a guy named Furuya, who's in a different class. At first, he thinks that Furuya might be trying to confess to him, but it turns out that he just "wants to be friends." Hanamoto is nonplussed – and perhaps a bit disappointed – but he agrees, and soon finds himself spending more and more time together with Furuya. But what, really, is this innocent-looking boy's reason for brazenly seeking out Hanamoto's acquaintance?

Shizuka is your typical employee who can do work seriously and with accuracy. But he has an opposite side of himself, where his mouth smoothly speaks nothing but affectionate lines. He's intoxicated by this side of himself that comes out only on the streets at night when he’s in the mood for love. One night, he meets Suzukuni, who has Shizuka's ideal face and build. For Shizuka, he was just a one-night stand. While Shizuka tries to forget that amazing night, Suzukuni comes into his workplace, introducing himself as the acting president.

Takaoka and Yukihito see each other as life-long partners. However, one day, Yukihito left home while Takaoka was away, leaving only a note saying, "Thank you for everything," and his house key. Two years have passed and Takaoka still can't forget about Yukihito, while wondering if it's all right to let things stay as they are. One day, a younger man, who looks like Yukihito, is waiting for him by his house, claiming to be his runaway lover.

Mitsuru goes out night after night looking for strangers to have sex with. Rumours are flying around school that he's a prostitute, but this is fine with Mitsuru, who prefers to be alone. Transfer student Hasegawa is irritated by this attitude and he begins to follow him around. Will Mitsuru's loneliness finally be abated as Hasegawa keeps forcing himself into his life?

As part of a losing a bet, Mitsuya has to stand at a popular spot for gay cruising. He is approached by salaryman Saitou and invited to a hotel, where Saitou proceeds to masturbate in front of him.

One day, Arata was forced to take in a freeloader by the request of his friend. The freeloader in question, Narumi, almost burns everything when he cooks, and he can't get into the bathtub on his own; in other words, he's a hopelessly clumsy man. Arata is at a loss, but he just can't leave Narumi alone!?