After Transmigrating Ten Years Later, I Became a Master at Taming Yandere

When I woke up, I discovered I had transmigrated ten years into the future. In my nineteen-year-old body, I desperately wanted to see my friends, give them a huge surprise, and find out what everyone had become over the past decade.

My younger brother, who had long since become a mature man, told me they'd all become top figures in their respective fields. He also told me that I was still an irreplaceable friend to them.

But my brother also told me I had died in an accident three years ago.

Those top figures had gone mad, become fools, or disappeared. Without me in their world, none of them was normal anymore.

The main story is told in third person.

Content warnings: All characters are in love with the female lead, mixed orientations, BG + GL, includes biological sibling romance with a significant amount of focus, and confinement scenes that don't involve abuse of the female lead.

Theme: Love is the one thing that can always heal the heart