I didn't know what to expect exactly from this drama, but I can say that it was a pleasant discovery!

In terms of story, the premise is actually not very exciting - it's about a man who decides to live a peaceful life as the sole owner of a coin laundromat, and about a high schooler who starts to hang out at said laundromat every day. What I believe makes this series much more interesting as it goes on lies in the character dynamics, their introspection and their slow but steady development.
Shin is at his last year of high school, and he's a delightful mix of mature and youthful personality traits: he's responsible with his duties and takes good care of the people surrounding him, even when he doesn't really like them, but he's also very passionate about what (and who) he likes and never afraid of being straightforward and honest with his feelings.
Akira is comfortable in his skin at first sight, but it's also a comfort that he created by building a wall around his feelings: he can be affectionate with other people, but he also makes sure to draw a clear line so that nobody crosses it, not even himself. For this same reason he'd rather hide what he actually feels and put on a facade.
As the story goes on, we can clearly see how both of them influence each other's attitudes in a positive way. Shin gradually learns to compromise and to accept things that he doesn't like for the sake of the people he loves, while Akira slowly comes out of his shell and comes to terms with the painful events of his past, as well as the feelings he has in the present. The feelings they have for each other take time to fully bloom, but the result couldn't be more satisfying in my opinion.
I was half expecting to hate the secondary characters, but I actually ended up loving most of them. Even the secondary couple, while not explored as much as I would've liked, was very cute. The only character I wouldn't say I liked was the fujoshi, as I saw both her and the events tied to her as pure fanservice.
I can't recommend this series if you're looking for steamy love scenes, as there isn't any. If you're looking for a cute slow burn romance, make sure to watch this one!