ren

Hope everyone is doing well....
Looking for a manga it goes like this,
The ML finds a tin with a letter and decides to respond so he puts in it and then a few moments he hears something move in the tine. When he opens it, he discovers another letter.
Fast forward a bit it turns out that the other ML was sickly and was in the hospital and wrote letters to past time.

Thank You.

so I am looking for a manga, goes like this;
the guys are high schoolers. not sure if one of them is form the country side. but i remember at the end of the manga there's a flower that was on the side or the neck of one the guys and it was plucked. it was a beautiful flower. Don't remember why it grew on the guy int he first place.
thank you.