Yukinoshita firefly of love blue day - secret cohabitation with your sister-in-law - with pillow cover (related products of this title)

This spring, the main character entered the local school, Seiyo Gakuen.
He had a secret that he could not tell.

"All the new students who have welcomed the entrance ceremony on a good day today.Congratulations on your admission."
"On behalf of the current students, I would like to express my heartfelt welcome."

She smiles on the stage, student council president Yukinoshita Hotaru, the sister-in-law of the hero who became a family by the remarriage of parents.

The younger brother who takes the distance because he is a person of admiration and love.
Because my brother is too cute and I love it, my sister who can not pack the distance well.

The turning point of the relationship between the two is the sudden decision of the parents' overseas business trip.
Of course, it is the main character and sister who protect the absence.
Even if it is negative, it is a feeling that heightens.

Cohabitation life without secret Ikke, now, to start!

この春、地元の進学校・清陽学園に入学した主人公。
彼にはおおっぴらは言えない、ある秘密があった。

「今日のよき日に入学式を迎えられた、新入生の皆さん。ご入学おめでとうございます」
「在校生を代表して、心より歓迎申し上げます」

壇上で微笑む彼女、生徒会長の幸乃下蛍は、両親の再婚で家族になった、主人公の義理のお姉ちゃん。

憧れの人で、大好きだからこそ、距離をとってしまう弟。
弟が可愛すぎて大好きだからこそ、上手く距離を詰められないお姉ちゃん。

煮えきらない二人の関係の転機になるのが、突然、決まった両親の海外出張。
当然、留守を守るのは主人公とお姉ちゃん。
否が応でも高まる想い。

秘密のイケない同棲生活が、今、スタートする！