Sex scenes in this one his completely glossed over with no nudity or acts of that nature. More like; use your own imagination type scenarios.
Main story is the bomb! Other side stories were ok/enjoyable but Keita is just awesome. No smut in any of the stories
The main story in this manga is separate from Bokurani Matsuwaruand it was great! Just a small heavy petting scene but no smut. There's no continuation of Bokurani Matsuwaru in this manga, just scenes that can already be read in the first book however, to understand those scenes, u'd need to read part1 anyway. Other side oneshot is about blood cousins but no actual culmination (yet)
Part1: Bokurani Matsuwaru
Part2: Bokura wa sore o hitei dekinai
Ai ga Love Shite You nanosa