Kiss that Kills: Parallel (2018 - 2018)

After Otaro gets trapped under falling steel beams and gets killed by Saiko, Misono gets attacked and the Horse Riding Club members suspect a certain person as the culprit.

Kazuma attacks Misono, leaving her with a serious cheek injury. Three months later, Misono receives a letter from Hiroyuki that helps her open up, but another tragedy looms as Takauji grows jealous.

Otaro dies after jumping off a building, leaving Saiko filled with remorse. She faces a dilemma about kissing someone else.

Nezu picks up the tape of the ship incident and proposes a deal to Gunji.

In another timeline where Takauji stopped Hotei from killing Hasebe, he regains others' trust and notices a frightening possibility.

After Misono dies, Takauji's life spirals and leads him to become a host in Kabukicho, where he rose to the top and manipulated others due to an intense, incomprehensible obsession with being a host.

Takauji clears his name with the police by blaming Hotei, who suffers from being wrongly labeled a murderer even after release. Marin empathizes with Hotei's plight, leading to an intimate night together and a plan to start anew.

Hasebe, believing he can now make Misato happy, investigates Saiko's role in the incident with Nao, leading to a surprise discovery.

Otaro runs a detective agency after time-leaping back. A year later, Saiko finds him.