E1 - He and a Genius Each Consider a Decision Pertaining to X
!Oct 6, 2019 - 24m
Even during summer vacation, Nariyuki and the girls have to study hard at cram school. One day, Rizu gets an abysmal "E" on one of her tests. Depressed, she shares her grade with the other girls, which causes an uproar. That's because they mistakenly think she's telling them her bra size.
E2 - At Times, an Elder's Pride Is in Direct Opposition to X's Circumstances
!Oct 13, 2019 - 24m
The maid cafe where Asumi works is starting a housekeeping service. Nariyuki and Asumi go together to their first clients, who turn out to be people they know, like Mafuyu and Uruka.
E3 - With the Changing Seasons, a Genius Experiences the Sorrow of X
!Oct 20, 2019 - 24m
Thanks to her dad, Rizu accidentally cuts her bangs way too short. At first she doesn't care, but gets more embarrassed until she hides her face from Nariyuki and dons a mask.
E4 - Sometimes a Genius Struggles With a Limited X
!Oct 27, 2019 - 24m
At the library, a beautiful girl Nariyuki has never seen before sits next to him when he's studying. He's nervous that he's getting hit on, not realizing the girl is actually Rizu, who has changed her hairstyle at a salon.
E5 - A Heartfelt Gift Sometimes Becomes a Complicated X
!Nov 3, 2019 - 24m
At Nariyuki's house, Fumino is on her way out after a study session when he gives her a birthday present. However, when Fumino opens it, she's startled to find a bra. What was Nariyuki thinking?!
E6 - Wherefore Might They Fathom the Aspirations of the Immediate X
!Nov 10, 2019 - 24m
When Mafuyu can't use the bathtub in her apartment, she goes to a neighborhood bathhouse. On the way, she encounters Asumi and Nariyuki, and ends up in the sauna with Asumi. It's so hot that the two get punchy.
E7 - A Genius Secretly Responds with X to Their Conjectures
!Nov 17, 2019 - 24m
Nariyuki, Rizu, and Sawako go to an open campus event. Nariyuki and Sawako both want the other to become closer to Rizu, so they use every excuse in the book to get away so they can leave the other with Rizu.
E8 - The Flow of X Never Ends...
!Nov 24, 2019 - 24m
Nariyuki is on the verge of failing Physical Education! Uruka tries teaching him how to swim, but she's so bad at teaching that it doesn't do any good.
E9 - The Star of Ultimate Love and the Name of X, Part 1
!Dec 1, 2019 - 24m
Parent-teacher conferences are being held at Ichinose Academy. Nariyuki intends to decide his major based on what would be best for his family. Meanwhile, that math professor appears at the Academy.
E10 - The Star of Ultimate Love and the Name of X, Part 2
!Dec 8, 2019 - 24m
Fumino continues to live with the Yuiga family. One day, his family needs to go out, leaving Nariyuki and Fumino alone. In gratitude for letting her stay over, Fumino attempts to cook and clean, but fails miserably at every turn!
E11 - X Descends Like Wildfire at the Festival's Beginning
!Dec 15, 2019 - 24m
While Fumino, Rizu, and Uruka all know what their major in college is going to be, Nariyuki still can't decide what he wants to do. Meanwhile, everyone is busy getting ready for Ichinose Academy's school festival.
E12 - X Treads a Thorny Path as the Festivities Continue…
!Dec 22, 2019 - 24m
The school festival is a roaring success! At the swim team's live stage show, Umihara and Kawase perform with Mafuyu in a Full Pure costume for some reason.
E13 - A Post-Festival Celebration of X, Both Dazzling And Lonely
!Dec 29, 2019 - 24m
The animal-costumed Nariyuki's intrusion onto the stage brings Fumino's play to an ending that has the crowd on its feet. Meanwhile, business is booming at Rizu's class's udon shop.
