Kinda dumb on this ,sorry for this

i have some manga i want to find , and still remember the summary, try it on google but it never get the result i want

so example the manga i want to find

"a boy who have crush on his classmate, but know she was out of his league, then a mysterious girl come and say she come from parallel world and say he date his crush on her world".

is any like that ?

You can use the search functionality on the series page (which does a fulltext search), or you can try to ask in the "I'm Looking For..." forum.