I'm looking for a yaoi that is about this guy(he is a teen i believe) who saves a kid who was use as an "adult toy"(it might be something else) from one of his missions.. And then raises him !! The kid has grown and want a to to missions as well and would do anything !! The guy who raise him slowly realizes that he is in love with the kid he saved!! And the kid has been in love with him since a long time.

I know my description is a little messy. I read this manga a long time ago!! I would appreciate if is found..thank you!!

I'm not sure but is it gareki no rakuen?