Arc 1The Affection System Begins

Kitagawa Kai used the Affection System to build connections across the classes while profiting from the school’s hidden rules and joining the Student Council. The stretch ended as he prepared to race Kanzaki Ryūji and Shibata Sō in a swimming lesson, with Ichinose Honami watching.

Chapters 1–2525 summaries

Arc 2The May Exam Preparations

Kitagawa Kai built relationships across the classes while selling Class B’s information and helping its students prepare for the midterms. As Class D faced zero points and an unexpectedly difficult exam scope, Horikita Suzune remained determined to judge matters for herself.

Chapters 26–5025 summaries

Arc 3Loans, Confessions, and Class B

Kitagawa Kai helped Horikita Suzune and Class D through the midterm crisis while building closer ties with Suzune, Kushida Kikyo, and Ichinose Honami. As he strengthened Class B and pursued his own Student Council ambitions, Ichinose and Kai publicly began pretending to date, leaving Kushida and Suzune in his orbit.

Chapters 51–7525 summaries

Arc 4Confessions and Class Conflicts

Kitagawa Kai helped expose Class C’s harassment, secured evidence that could have saved Ken Sudō, and drew several girls closer as he openly pursued a relationship with Ichinose Honami. The arc ended with Ichinose moving into Room 520 and joining Kamuro Masumi and Kushida Kikyo in confronting Kai’s womanizing.

Chapters 76–10025 summaries

Arc 5The Uninhabited Island Exam

Kitagawa Kai claimed sites across the island, maneuvered among the classes, and helped Class B win the Special Exam by a wide margin. Back aboard the cruise ship, his relationships with Ichinose Honami, Shiranami Chihiro, and others continued to develop as he prepared to help Horikita Suzune and Sakura Airi.

Chapters 101–12525 summaries

Arc 6Summer Break and New Bonds

Kitagawa Kai navigated the Minority Exam, deepened his relationships, and helped Karuizawa Kei confront her past. As summer break began, Hirata Yosuke took charge of Class D, while Kai’s relationships with Horikita Suzune and Karuizawa Kei continued to develop.

Chapters 126–15025 summaries

Arc 7The Birthday Rings

Kitagawa Kai built ties with more girls while Class A prepared for the Sports Festival and rival classes considered how to counter it. The arc ended with Kai celebrating his birthday in Room 520 and giving personalized rings to the girls gathered there.

Chapters 151–17525 summaries

Arc 8Sports Festival Victory

Kitagawa Kai led Class A through the Sports Festival, defeating the White Team’s schemes and winning the final relay. Class A finished with a record score, while the festival left Nagumo’s rivalry with Kai and several personal tensions unresolved.

Chapters 176–20025 summaries

Arc 9The Presidency and New Council

Kitagawa Kai challenged Miyabi Nagumo for Student Council President, won the schoolwide election, and began reshaping the council. He left the arc facing Nagumo’s mass resignation and rebuilding the council with allies and representatives from every first-year class.

Chapters 201–22525 summaries

Arc 10New Rooms and Paper Shuffle

Kitagawa Kai reorganized the Student Council, arranged shared Faculty Apartment housing, and deepened his relationships while countering investigations into his private life. Paper Shuffle preparations left Class A facing Class B and Class D alarmed by its pairings after Yukimura Teruhiko secretly disrupted its quiz strategy.

Chapters 226–25025 summaries

Arc 11Class D Under Contract

Kitagawa Kai took control of Class D after Hirata Yosuke sought his help to prevent expulsions, then organized joint study sessions and a strategy for obtaining Class C’s exam papers. Hirata Yosuke secured a paper-sharing deal with Ryuen Kakeru after Shiina Hiyori recognized the threat behind the negotiations.

Chapters 251–27525 summaries

Arc 12Winter Break and New Bonds

Kitagawa Kai pushed the Diversified Development Plan through approval while balancing student activities, romance, and growing ties with the girls around him. The arc ended with Himeno Yuki moving into the Faculty Apartment and Kai agreeing to meet the Art Club president.

Chapters 276–30025 summaries

Arc 13The Public Hearing

Miyabi Nagumo’s complaints against Kitagawa Kai were dismissed, damaging Nagumo’s standing and strengthening Kai’s position at school. As the students prepared for exams, Kai grew closer to several girls and ended the stretch facing Sakayanagi Arisu’s challenge over Class B’s exam papers.

Chapters 301–32525 summaries

Arc 14Izu Peninsula Trip

Kitagawa Kai organized a four-day Student Council trip to Izu, bringing together the girls for sightseeing, games, and closer moments with him. At the Bamboo Grove Path, Yamamura Miki learned to control her concealment ability, and the group returned to Hot Spring Street for a gift-picking game.

Chapters 326–35025 summaries

Arc 15Gifts and Mountain Escapades

Kitagawa Kai joined the girls on a gift-filled outing, helped Ichinose Honami’s family and Katsuragi Kohei’s sister, and began dating Hasebe Haruka. The group continued its trip through Mount Omuro and Izu Shaboten Zoo, where Kai and Asahina Nazuna ended their peacock bet with competing claims about who had won.

Chapters 351–37525 summaries

Arc 16Shimoda Dates and Confessions

Kitagawa Kai and the girls spent a Christmas Eve trip moving between heartfelt declarations, games, hot springs, and dates, while their relationships with him deepened. In Shimoda, Kai continued shopping with Horikita Suzune and Sakayanagi Arisu after sharing the story of his childhood and inheritance.

Chapters 376–40025 summaries

Arc 17Christmas at Moon Court

Kitagawa Kai and Shiina Hiyori helped solve a murder before returning to the group’s Izu Christmas gathering, where a stray kitten joined their plans. The holiday brought new romantic confessions and ended with Kai and the others playing in the snow.

Chapters 401–42525 summaries