Re:Zero Kara Hajimeru Isekai Seikatsu - Volume 4, Chapter 3: Excerpt from [The Girl in the Forbidden Library]

After suddenly dying while trying to meet a deadline, Gu Huai transmigrated and became a non-human race.

This race is cruel and cold, making them feared and shunned by everyone in the interstellar world.

As the new king of the race and facing the group of parents who see him as a baby, Gu Huai said he was under a lot of pressure.

- Description from Novelupdates

There are three good things about Master Mu: good marksmanship, good skills, and good wives!

Protagonist travels between different anime worlds to right wrongs and uncover his reason for being along the way.