Honestly, it's a good story, but I still wished similar to Ruka, I wished Shizuka also stopped before doing the deed in time of desperation. That's probably why I can't give this a higher score than 8.
SPOILER: Especially, since his middle school crush had no intention of staying with him, and Shizuka had no intention of staying with her happily. Unneeded drama - could have used those chapters to showcase better interaction b/w the two MC's, and their relationships b/w their best friends/family.
7.5(or 8)/10 - worth a read, but not a reread.