Osomatsu ends up meeting the CEO of a multi-trillion yen company, who wants to adopt Osomatsu as his own. The other brothers find out and they can't let that slide without a fight.
| Actor | Role |
|---|---|
 Koji MukaiOsomatsu | Osomatsu |
 Hikaru IwamotoKaramatsu | Karamatsu |
 Ren MeguroChoromatsu | Choromatsu |
 Tatsuya FukazawaIchimatsu | Ichimatsu |
 Daisuke SakumaJyushimatsu | Jyushimatsu |
 RaulTodomatsu | Todomatsu |
 Ryohei AbeClose | Close |
 Ryota MiyadatePeriod | Period |
 Shota WatanabeEnd | End |
 Hikaru TakahashiTotoko | Totoko |
 Yasuyuki MaekawaIyami | Iyami |
 Hiyori SakuradaChibita | Chibita |
 Mari HamadaMatsuyo | Matsuyo |
 Ken MitsuishiMatsuzo | Matsuzo |
 Rikako YagiHaru | Haru |
 Louis KuriharaMatsuda | Matsuda |
| JJason AtsugiriAutumn | Autumn |
 Ryo KatoHatabou | Hatabou |
 Shugo OshinariReiji | Reiji |
 Akari TakaishiHatsumoto Nyaa | Hatsumoto Nyaa |
 Kaho MinamiOld lady | Old lady |
 Takaaki EnokiOld gentleman | Old gentleman |
| MMegumu NakazatoNot listed | Not listed |
 AyameNot listed | Not listed |