Plan

Plan is the fourth episode of Doreiku: The Animation, which was first broadcast on May 4, 2018.

Plot
Prior to his encounter with Shiori and Taiju, Zenichi obtained a SCM device in order to live large. After the encounter, he becomes a slave to Zushiohmaru as he unknowingly agreed to a duel with the dog.

Afterwards, Ryuuou's colleague Ataru Chuuou takes Shiori and Taiju with him to Ryuuou, while sending Zenichi to the hospital. However, Eia takes Zushiohmaru with her as she and Yuuga let Chou know that they are out to release slaves from the SCM. The next day, Zero Shinagawa is approached by a mysterious boy claiming to want revenge against the person who beat up his father causing permanent brain damage. Zero is pressured to agree, and he puts on the SCM engaging in a trivia contest with Chou, who the boy claims to be the criminal, with the boy also participating. However, it was a trap as the boy, revealed to be Ryuuou, was actually the person Zero challenged. Zero loses the duel and becomes Ryuuou's slave.