This week, in the “Boy, Girl and —” arc finale, Souma Sumire comes to Kei’s place, makes chicken curry, telling him about how Urachi grew up while she cooks. Urachi is basically Kei’s opposite: he wants all abilities to be wiped out, because he believes they’ll hurt, rather than help, the weak in the world (though we’re just talking about one small town here).
Then Souma takes a shower, because, as Kei presumes, she knows she’s going to cry. She tells Kei that Souma Sumire died so that when she was ultimately brought back by Kei’s efforts, she wouldn’t really be Souma Sumire anymore, which allowed her to pass Sakuin’s lie detection.
This “artifact”, as she calls herself, still intends to hinder Urachi, and so did everything possible to give Kei a chance to thwart his plans—except tell him everything before she set her plan into motion.
The fault for this lies in the Souma of two years ago who no longer exists, and though “Souma II” admits she and her are pretty much the same, it was that first Souma who acted “foolishly”, letting Kei get stolen away by Haruki, then forcing all of the “hard parts” onto her replacement. She can’t forgive her, but like her, Kei’s happiness comes first.
Kei expresses his gratitude to both Past Souma and Souma II, and as they eat the curry, he notes how the flavor is “oddly nostalgic.” Souma used her ability to draw from his mother’s know-how, but just as she’s not 100% the Souma Sumire she used to be, something made with “a mother’s love” cannot be 100% replicated.
Kei commits to beating Urachi, which he intends to do by claiming all of the abilities in Sakurada, as the MacGuffin promised to do. The miracles they’ll create will be happy, not a danger or nuisance as Urachi so strongly believes.
Kei made sure to warn Haruki that Oka Eri may pay her a visit, and to let him know if she takes her Reset ability (again). Sure enough, Urachi arrives with Oka, and instead of having Oka take her Reset right there, he uses his own ability on her, “rewinding” her to two-plus-years ago, before she met Asai Kei (and when she had really long hair.)
He leaves the sleeping Haruki with Oka, telling her to take her Reset once she wakes up in the hospital.
Oka Eri wants to beat Senpai, but a part of her still admires, looks up to, and loves Kei, and so when she heard his voice message in her head, telling her he’s been “backed into a corner”, and asks if when the time comes she won’t take Haruki’s reset…it puts Oka in a moral bind.
Just as Souma got around Urachi’s lie detector through rather desperate measures, I wouldn’t be surprised if Kei has to make similar sacrifices in order to succeed in his mission.
The stakes couldn’t be higher: his relationship to Haruki and the abilities of the town hang in the balance, and Urachi, preparing to wake up his “petrified” mother after 20 years, is playing for keeps.