*I know, it also makes my heart accelerate, seriously*
What first struck me about this manga is its drawing, it seems so delicate ... beware ... and a bit simple for its stroke, but that, nevertheless, manages to recreate beautiful scenes in its pages. Leaving that aside, the story is a little more mature, and this is reflected in the contrast of age, or perhaps its mentality, the complexity of both characters. I like too much this difference, among others, of both characters.
He is, seriously, quite shameless, rational, (I have to say, attractive) but at the same time very sweet. She is fragile, determined //shy, who does her utmost to give her love to sempai.
The differences between them and their combination, is, from my point of view, very attractive. also, without having a touch of comedy or fantasy, it becomes a manga out of the ordinary or normal. I feel that you can relate something else ... enjoy it