Responses
It’s been like a few years so I don’t remember the ending being happy or sad, but it makes me think of Nanohana boys.
http://www.mangago.me/read-manga/i_will_be_waiting_for_you_in_1999/
I just finished rereading Nanohana Boys and am looking to find another wholesome read where you’re just so glad the characters had a happy ending.