Ore no Imouto ga Konnani Kawaii Wake ga Nai.

An anime that's main story focus have romance relationship between blood-related male and female characters (not in-law family member).









note : why I'm doing this? idk.

Anime in which characters have delusional personas, or believe they are a fictional character. Others may think they are out of touch with reality.

Chūnibyō (中二病) is a Japanese colloquial term typically used to describe early teens who have grandiose delusions, who desperately want to stand out, and who have convinced themselves that they have hidden knowledge or secret powers. It translates to "second year syndrome" (i.e., middle-school second-year), and has been called "eighth-grader syndrome" in English-speaking countries. [Wikipedia]

Reference: https://www.anime-planet.com/characters/tags/chuunibyou?page=1

Romance between siblings, cousins. This list contains blood related, step, adopted and cousins. Also check out the part 2 of this theme. And also check out the incest hentai interest pack if you watch incest hentai.

I have watched every show on this list and i have ranked them in my personal viewing experience and not in amount of incest, for example elfen lied have cousins complex and it is not that much but I still ranked it high

Romcoms that you will find relaxing(but sometime cry over because your fav girl didn't win)