The age gap did bother me for a while esp since the teacher was the one started it but like gosh the way it framed the story, you knew that they were already old and looking back on memories. That made my chest ache in the best way. Got scared too xD i thought they were gonna show sensei like bedridden or something T.T I would love to see more but my heart prolly can't take that. Oh and really the best manga and manhwas I've read always involved changing seasons, in some way or another T.T
Young Good Boyfriend