Just like a surprise guest in the world, ink stains the stars, clouds and water
Lightning protection guide:
1 The male protagonist has no CP
2. Everyone is be, no one gets what they want, but the extra is he
3. Harem direction, but the supporting characters are all single arrows
4. It's not "polygamy", the male protagonist's side story is just a story line separate from other people.
5. There will be a third gender (boys who can give birth to children)
6. The male protagonist is the third gender, but this article does not give birth to children, and the male protagonist will not have children.
Concept: There will always be regrets at the end of the story