Lots of incest, and flirting between family members. Sexual harassments by romantic interests. Its funny and problematic. The brother complexes everywhere. Yandere sibling.
Never have I seen so many identical and fractural twins in a single story. So there's a kiss between son and dad. There an uncle dating his nephew going as far to work at the school to stay close to his student/nephew/lover.
could be translation error or not. who knows.