Adachi And Shimamura Volume 4

Adachi and Shimamura are now in their second year of high school. Luckily, they’re in
the same class this year, but Adachi doesn't seem too pleased with the fact that
Shimamura is having no trouble fitting right in with their new classmates.
Acquaintances, friends, best friends―those are all well and good, but how do you take
that final step? Maybe having a sleepover and sharing a bed together...?