The main story is delicate and soft and sweet. The following doujins after chapter 5 is sweet and lewd and cute. It's not for people who wants drama and misunderstanding and heightened conflicts, but everyone else should enjoy this story a lot. Also a special point has to be made for Mitsuru, the seme. Often times stories featuring characters like these tend to make sweet and kind characters like him cross a certain line (including, but not limited to SA) to show how overwhelmed they are by this passionate love. It's a common move, but it's also annoying because of the implications. Because of that, it'sextra nice to see this story ACTUALLY remaining consistent with Mitsuru's kind and brotherly character.

Oh, he gets LEWD. A LOT. Especially in the doujins. But he also respects Seiichi's consent and well-being through it all.