When they were four years old, Towa and Setsuna were playing together in a forest until they get caught in a fire and while trying to rescue her sister, Towa is dragged away by a portal which leaves her stranded in the present. She is found by Kagome's younger brother Sota, who takes her in. Ten years later, Towa is being harassed by some bullies despite changing schools to avoid them, although she easily defeats them in a fight. Back in the past, the Demon Slayers Hisui (the son of Sango and Miroku), Kohaku, and Setsuna confront Moroha, mistaking her for a demon that is attacking the locals, until Mistress Three-Eyes appears and steals the Red and Gold Rainbow Pearls in Moroha and Setsuna's possession to power herself up.
In the present, the bullies return and hold Towa's adopted family hostage, but she makes quick work of them and then they flee once they hear the police sirens, unaware that they were just passing by. Suddenly, a portal opens, dragging Setsuna, Moroha, and Mistress Three-Eyes to the present before Towa, who recognizes her long-lost beloved twin sister. Sensing the Silver Rainbow Pearl in Towa's possession, Mistress Three-Eyes attacks her as well. Towa tries to slash her, but her sword breaks in half, much to her shock.
Tropes:
- Curb-Stomp Battle: Towa easily took down a group of delinquents that challenged her to a fight. It's gotten to the point where she's annoyed by how weak they are.
- He's All Grown Up: Sota is now an adult with his own family.
- Hostage Situation: The delinquents manage to abduct Towa's sister Mei alongside Ms. Higurashi and Grandpa in order to take their revenge.
- Gratuitous English: Minor character Kirin Osamu, a teacher at Towa's school does this. Justified since he's an English teacher.
- Let's You and Him Fight: Hisui, Kohaku, and Setsuna meet Moroha and mistake her for the Youkai that has been attacking a local village. She tries to explain that she is hunting the real culprit, but they attack her. Eventually, the real culprit, Mistress Three-Eyes, shows up.
- One-Gender School: Towa attends St. Gabriel's Academy, an all-girls' school. This was done after transferring to many schools since Towa keeps getting involved in many fights.
