Dark, psychological thrillers, school setting, taboos, twists, manipulation, societal issues, unclear motives, violence... like misbehavior could have been a girl from nowhere episode in a different universe if youd flip the genders.

Both are korean psychological thrillers about manipulation, power imbalance, obsession and obsessive love, unclear motivations and twisted characters that dont hesitate going to extremes. Both include taboo love triangles and age gaps and are pretty dark.

Both movies feature children as the main characters. They deal with growing up. Both films include fantastical elements and the children have vivid imaginations.

Both are movies about young girls dealing with growing up. The films are heartfelt, calm and include a nice message.

Both are sincere movies about young girl main characters growing up and facing new issues and expectations.

Both are lgbtq+ movies that feel sincere. One character does sex work, one character is closeted, one characters meets an unfortunate fate... the relationship feels alittle push and pull in both (in egoist in the beginning at least).

Both movies were written and directed by the same person, besides that on the surface they dont look like they have much in common. However, both movies discuss themes of love, both have sad elements and in both theres an age gap between the characters.

Two men become attracted to eachother, they face up and downs.
Both are japanese movies in which the central couple has an age gap too and the theme of family is relevant in both.

Two men, one of them being a sex worker, start a romantic relationship hide it in front of the parents of one of them though. However, his partner comes over to eat alot and he forms a bond with the guys mum.
Still, theyre met with tragedy.

Both are japanese movies that have lgbtq themes. They follow a gay adult man as he develops a strong bond/relationship to another person. However, things dont go smoothly, tragedy hits and he instead tries to connect with the family of the man he loves.

Two female best friends meet a guy. One of the girls falls in love with him, he however starts crushing on the other friend.
Boths films discuss friendship, love and feature a complicated love triangle.

Two men enter a relationship, one has a single mum which his partners is acquainted with as theyve eaten together etc., yet theyve not revealed their relationship to her. However, as tragedy strikes and something happens to the son his partner and mum grow closer.