Under The Oak Tree Mangakakalot

This webtoon describes the not the nice Oppa you see in dramas or movies. This is the real brother-sister relationship. The real Oppa is here!"

#18100 deaths 100 reincarnations I am sick and tired of my life being frozen at 17 She decides to murder everyone. You are insane You are a sinner Dear Raymond, I am already in hell.

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From CoyoMoose:Kogure is a normal high-school girl who loves shoujo manga and food. She wants to fall in love, however there is one big problem - she's terrified of real guys. Then, one day, she runs into her ideal guy, and he's real!

It is a humanoid machine that has completed its original mission. It is an abandoned child born from war damage. The two met on a rainy day in a devastated world. And "machine" and "human" became "parent and child".