ONEE-SAN TO II KOTO ♡

The volume includes the following chapters:

1. Over Drive (オーバー♡ドライブ, Over ❤ Drive); COMIC X-Eros #50
   
2. Over Charge (オーバー♡チャージ, Over Charge); COMIC X-Eros #61
   
3. Over Summer (オーバー♡サマー, Over Summer); COMIC X-Eros #67
   
4. Swimmy! (Swimmy！, Swimmy!); COMIC X-Eros #75
   
5. Isshoni Swimmy! (いっしょにSwimmy！, Swimmy Together!); COMIC X-Eros #79
   
6. Motto Swimmy! (もっとSwimmy！, More Swimmy!); COMIC X-Eros #83
   
7. Manabu Obocchama wa Shishunki (学お坊ちゃまは思春期, Master Manabu Has Hit Puberty); COMIC X-Eros #53
   
8. Himitsu no Jikan (ひみつのじかん, Secret Time); COMIC X-Eros #56