Dragon Chain Ori –Spirit in the “Heart”–
Solminati Academy is a gathering place for youngsters with dreams, hopes, ambitions, and various thoughts. There was a boy here who entered the school to support his beloved’s dream. However, the boy’s ability, which he had only thought of, did not improve, he was laughed at by the people around him, he had no friends, his lover was separated from him, and his steps stopped. However, he meets an old woman, and that encounter triggers a gradual change in the boy. This is the story of a boy who has stopped moving.
Dragon Chain Ori –Spirit in the “Heart”-
Ori of the Dragon Chain
Ryuusa no Ori -Kokoro no Naka no "Kokoro"-
2 LN Volume (Ongoing)
There's harem but I'm honestly not sure if it really is a harem genre... and it's a love triangle too, but you can expect to have drama coming your way when it comes to love. Story is pretty fleshed out since I read the web novel of this and mostly focused on school and the adventure guild as well as dragons and monsters and other powerful individuals/beings.
I'm not sure if it'll be the same as the light novel version. But I do think that if you give it a read (whether from raw or translated) you'd get a good idea about it.