娘のミライ 〜愛しい娘が快楽に堕ちる時〜

The protagonist, Aida Takanori, works as an office worker, living a modest but happy life with his only daughter, Miku.

One day, while attending school, Miku is confessed by a senior named Yuuki, who is extremely popular among the female students.
Lacking self-confidence, Miku tried to refuse the relationship, but Yuuki's enthusiasm persuaded her to accept.

Miku gave her virginity to the senior she admired and lived happily every day. However, Yuuki had a side that Miku didn't know. He has a secret life, where he sexually develops girls he likes and arranges them for other men.