I read the first few episodes of this series, got bored, and never looked for it again, but now I'm not going to be able to sleep until I find it. I believe it's a full color Manhua/manhwa about a girl from a modern fantasy world summoning a guy from a cultivation world through her school project. The girls bad at magic and I believe her mother's a high elf she never met and her fathers a troll. The guy has long white hair, I believe, and the girl has short hair that hides her ears. Nobody thinks she completed her summoning project one she goes to school. It might be a webtoon, but I weirdly enough can't find it.

Found it! It's called The Hero in case you were wondering.