beta
I saw that this had a live-action adaptation and wanted to read the manga first. This was amazing; despite the miscommunication, it was the perfect amount for me not to think it was excessive. Also, at first, I was worried about the sister, but I realized she was grateful to have Yamato as her older brother. (It was worded weirdly, but I think Yamato's sister likes girls, and Yamato's girl colleague is her love interest. At least that's what I think) Also, I love the story of the dad and Kakeru and how Kakeru saved Yamato's dad.
This story is well thought out, and I love the little details added. Although it's a common trope, this is unique, and I was smiling the whole time I read it.
Just remember that these are high school students. None of them are perfect, and you can see it in the manga, so just be thankful that the author is not over-sexualizing it or having another two volumes of miscommunication.
If you want to read something similar, I recommend Sasaki and Miyano.