![](https://cdn.animecharacters.io/images/characters/large/97865-8d0c0c80.jpg)
Hiroya Sakai (坂井 弘也)
Tomoki's younger brother. although they are 11 months apart, they are both second years in middle school. (Source: Dive!! Wikia)
Voice Actors
Ryouhei Kimura
Japanese
Tomoki's younger brother. although they are 11 months apart, they are both second years in middle school. (Source: Dive!! Wikia)
Ryouhei Kimura
Japanese