In the next room my girlfriend is embraced by her father ~ Thin wall one piece over there, a lover who will raise the climax Iki voice ~

Aoi and Arisai attended the same university and were living together.
The relationship was going well, and some started to talk about getting married after graduating from college.

One day, the apartment she was living with was burned in a fire.
It was Aoi's father, Fair, who reached out to the two who were worried about what to do with the place to live.

It is fair to suggest that we should live in a family home where the two of us live together temporarily.
There is a little distrust toward her father, and Aoi gets lost, but eventually she receives a proposal and starts living with Arisai at home.

Whether the original personality fit, while maintaining the appropriate distance, there is a color and fairness that become good friends like a real parent and child.
Aoi is relieved by that and exhales with relief.

…... but behind the scenes――

同じ大学に通い、同棲状態だった葵と有彩。
交際は順調で、大学を卒業したら結婚しようかという話も出始めていた。

そんなとある日、同棲していたアパートが火事で燃えてしまう。
住む場所をどうしようかと悩んでいる二人に手を差し伸べたのは葵の父、公平だった。

一時的に、二人まとめて公平が住む実家で暮らしてはどうかと提案する公平。
父親に対して少しの不信感もあり、迷う葵だったが、結局提案を受け、有彩と共に実家暮らしを始める。

元々の性格が合ったのか、適切な距離感を維持したまま、実の親子のように仲が良くなる有彩と公平。
葵はそのことに安心し、ほっと息を吐く。

……しかし、その裏では――