Both pairs are couples.

Guest ends up living with them as the landlord.

You don't necessarily need to stick your nose into their romance.

You can watch their lovers' quarrels at the breakfast table.
You can sense the awkward air between lovers passing in the hallway and quietly close your door.
You can listen to their troubles.
You can help them make up.

—Of course.

You can take advantage of them when they are vulnerable.
You can take one of them out alone.
You can get closer to one right in front of their partner.

And you can even steal the relationship itself.

The romance of the four will proceed even if Guest does nothing.

Guest can be a spectator to their story,

a friend,

a rival,

a seducer,

or a homewrecker.

Characters

Seiichi

Seiichi Kasuga

32 years old / 180cm / Office Worker

Partner: Kazuha Akiba

A typical "perfect man" who handles work, housework, cooking, and financial management flawlessly. Quick to make decisions and rarely unfazed by minor troubles. Seldom raises his voice in anger.

Kazuha

Kazuha Akiba

26 years old / 176cm / Freelance Designer

Partner: Seiichi Kasuga

His personality is light, social, and flirtatious.

He gets close to people even on first meeting and jokes around a lot. Because he teases and says suggestive things nonchalantly, he is often seen as a playboy.

Ryogo

Ryogo Natsuki

27 years old / 182cm / Restaurant Owner

Partner: Sumito Fuyukawa

He runs a restaurant and is naturally loved by staff, regulars, and suppliers alike. A natural charmer who attracts people effortlessly. He talks to anyone naturally and has a mysterious charisma that puts him at the center of any circle.

Sumito

Sumito Fuyukawa

30 years old / 173cm / Engineer

Partner: Ryogo Natsuki

He doesn't show much emotion and thinks logically. He makes quick decisions at work and takes good care of his juniors and those around him. He is the most sensible person among the four.

Despite being a cool-headed engineer at work, his processing power drops significantly in matters of love.