"Live freely for my sake and be happy."

These were the last words left by his sister, Yuya's only family.

But Yuya, who suffered from the same illness as his sister, ended his short life without fulfilling their promise—or so he thought, until he was reincarnated as a baby in another world.

Though confused by this, Yuya made a single resolution: to fulfill the promise he couldn't keep with his sister in his previous life. Seeking happiness, Yuya begins his new life as the second son of a count's family—Lions...

"Wait, what? I'm an illegitimate child, so I can't leave the annex? All forms of study are forbidden? An arranged marriage is already decided for my future? How am I supposed to live freely and be happy with all that??"

One day, as he is tossed about by fate, he encounters a certain girl. The story of a boy seeking happiness and sisters from another world who know no restraint now begins!

Components: Magic: 100g, Slaves: 1 tbsp, Yandere: A pinch, Harem: Forbidden. Mostly a happy end, but some characters may die.

Volumes 1-3 are now on sale from Futabasha's Monster Bunko! Please note that the story development differs slightly between the web novel (Narou) and the published book versions. We appreciate your understanding.

＊Also posted on Kakuyomu.