Currently available on 3 streaming services.

Sonny Boy - watch online: stream, buy or rent

Currently you are able to watch "Sonny Boy" streaming on Crunchyroll Amazon Channel or buy it as download on Amazon Video, Apple TV.

Cast

Aoi Ichikawa
Nagara (voice)
Saori Onishi
Nozomi (voice)
Aoi Yuki
Mizuho (voice)
Chiaki Kobayashi
Asakaze (voice)
Kana Ogino
Shanghai (voice)
Hiroki Goto
Rajdhani (voice)
Ami Naito
Hoshi (voice)
Hana Sato
Pony (voice)
Yoji Ueda
Cap (voice)
Shota Yamamoto
Hayato (voice)