Tsuki no Oki ni Mesu mama

Vol.3 Chapter 21
Vol.3 Chapter 20
Vol.3 Chapter 22
Vol.3 Chapter 20
Vol.3 Chapter 22
In middle school, Ayumu kept getting teased and pranked by Runa, even though he's a year below her. Now that she's in her second year of high school, she's ready to be the experienced senpai for the incoming freshman Runa.