Kaori Ishihara Voices a Cousin Who Can't Ignore a Mess
Episode 25, titled "Itoko no Kanojo" (The Cousin Girlfriend), opens with a family favor. According to Japanese anime news site Anime Anime, Rentaro's uncle asks him to look after his daughter Chiyo Iin (伊院知与) while he is away. Rentaro figures a cousin is safe territory. Then their eyes meet, and the familiar electric jolt hits, the series' unmistakable sign that he has just found another of his fated partners.
The preview images show what happens once he steps inside the house. Chiyo cannot leave anything out of order, and Rentaro somehow keeps fumbling in front of her, so the guy sent to look after her ends up being the one causing trouble.
Kaori Ishihara (Aladdin in Magi: The Labyrinth of Magic, Shōta Magatsuchi in Miss Kobayashi's Dragon Maid) voices Chiyo. Her casting was announced in March 2026 alongside Ayana Taketatsu, who plays fellow Season 3 newcomer Nadi. The official cast list still shows "???" next to three other new characters, Yamame Yasashiki, Momiji Momi, and Kishika Torotoro, whose voice actors have not been announced yet.
The 100-Soulmate Premise, in Brief
The 100 Girlfriends Who Really, Really, Really, Really, Really Love You adapts the romantic comedy manga by Rikito Nakamura (story) and Yukiko Nozawa (art), serialized in Shueisha's Weekly Young Jump magazine. Wataru Katō stars as Rentaro Aijo, a high schooler who racked up 100 rejections in middle school. At a shrine, a god of love tells him he is destined to meet 100 soulmates in high school. The catch: any fated partner who fails to find mutual love and happiness with him will die. That is why every new jolt is both a romance and an emergency.
Hikaru Satō directs the anime at Bibury Animation Studios, with Takashi Aoshima on series composition and Akane Yano handling character designs. Season 1 aired from October to December 2023, and Season 2 ran from January to March 2025.
Broadcast and Streaming in Japan
Episode 25 premieres Sunday, July 5, 2026 at 10:30 p.m. on TOKYO MX, followed by BS11 at 11:00 p.m. the same night, with Sun TV, Tochigi TV, and AT-X also carrying the season. In Japan, ABEMA and d Anime Store stream new episodes first on Sundays at 11:00 p.m., before a wider Wednesday rollout across platforms including Prime Video, Hulu, U-NEXT, and Disney+ Star.
Looking Ahead
For international fans, Crunchyroll streams the series, which carries Season 3 alongside the first two seasons. The source manga is published in English by Seven Seas Entertainment, which has been releasing volumes since February 2022; the Japanese edition is up to volume 26. And with three Season 3 girlfriends still listed without voice actors, more cast announcements should be on the way as the season airs.