Tokyo: I Am Their Father

Akiyama Seiichi, thirty-five years old, corporate drone.

He transmigrated to Tokyo thirty years ago, thinking he'd conquer the world like the hero of a dating sim. But he had no childhood friend, no bunny-girl senpai, and no club full of problem girls. Somehow, he wound up as a middle-aged man, crammed onto the Yamanote Line every day, getting chewed out by his boss and eating convenience-store rice balls at home.

Then one day, the number 91 appeared above the head of his stepdaughter, Kiyono.

[Fatherhood quest triggered: Keep her from going to school. Reward: Restore your hairline.]

Akiyama: ?

From then on, doing push-ups every day makes him younger, taking his daughters out earns him rewards, and making them happy lets him return to the age of twenty. Kiyono, Yuki, Chizuru, Yui: one by one, girls with numbers over their heads appear before him.

"Are you my dad?"

"No."

"Then why are you so nice to me?"

"...Because I want a happy family?"

They call him Dad. He helps them solve their problems, stays with them through hard times, and occasionally teaches a disobedient young lady a lesson.

But behind the System's quests, every number hides an emotional knot. Kiyono's 20, Yuki's zero, Chizuru's smile, Yui's thorns.

Tokyo is vast, vast enough for everyone to be an island unto themselves.

Luckily, someone is willing to be their island.