Yashiro-kun's Guide to Going Solo: After Story

Shigeaki Yashiro’s saga as an expert loner continues when the students of Iikanyama High take a school trip to Kamakura. Yashiro wants nothing more than to spend some time alone with his girlfriend, but his plan begins to fall apart when their popular friends ask the couple to join in on some group fun instead. How will these wildly different personalities get along? Enjoy these stories of the past and the future, from the perspectives of loners and cool kids alike.

[From J-Novel Club]