{"rewrite":{"id":"r_4b6fccffa45f909684873c68","clusterId":"c_fe2a835be4a38b0d908abb8f","slug":"live-action-my-sister-s-boyfriend-film-adds-rinka-kumada-reo-matsumoto","model":"deepseek-v4-flash:free","headline":"Live-Action My Sister's Boyfriend Film Adds Rinka Kumada, Reo Matsumoto","summary":"The teaser trailer and poster visual for the live-action film of Amu Meguro's manga announced two new cast members. Rinka Kumada plays Momo Sanae, Sui's older sister and Midori's girlfriend. Reo Matsumoto plays Ayame Mizukawa, Sui's childhood friend. The film stars Masaki Hashimoto as Midori and Runa Nakajima as Sui, and Mahito Kimura directs. It opens in Japan on December 4.","whyItMatters":"The two new castings round out the supporting cast around the central trio, filling the sister and childhood friend roles that anchor the manga's premise.","webCardHtml":"\u003cp\u003eThe manga centers on Sui, a third-year junior high student who does not get along with her older sister\u0026#39;s boyfriend Midori because he always treats her like a kid and makes fun of her. When Midori is suddenly asked to become Sui\u0026#39;s home tutor, she sees an unexpected side of him. The film is directed by Mahito Kimura with a script by Nami Kikkawa, and Shochiku plans and oversees the production while also distributing the film.\u003c/p\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eRinka Kumada\u003c/strong\u003e: plays Momo Sanae, Sui\u0026#39;s older sister and Midori\u0026#39;s girlfriend\u003c/li\u003e\u003cli\u003e\u003cstrong\u003eReo Matsumoto\u003c/strong\u003e: plays Ayame Mizukawa, Sui\u0026#39;s childhood friend\u003c/li\u003e\u003c/ul\u003e","blueskyPost":"Live-action My Sister's Boyfriend film adds Rinka Kumada as Momo Sanae and Reo Matsumoto as Ayame Mizukawa. Masaki Hashimoto and Runa Nakajima lead the cast. Opens in Japan December 4.","twitterPost":"Live-action My Sister's Boyfriend film adds Rinka Kumada as Momo Sanae and Reo Matsumoto as Ayame Mizukawa. Masaki Hashimoto and Runa Nakajima lead the cast. Opens in Japan December 4.","threadsPost":null,"newsletterBlurb":"The live-action film of Amu Meguro's manga My Sister's Boyfriend added two more cast members with a new teaser trailer and poster. Rinka Kumada and Reo Matsumoto join a cast led by Masaki Hashimoto and Runa Nakajima. The film opens in Japan on December 4.","attributionJson":"[{\"source\":\"Anime News Network\",\"url\":\"https://www.animenewsnetwork.com/news/2026-08-04/live-action-my-sister-boyfriend-film-teaser-announces-more-cast/.240290\",\"title\":\"Live-Action My Sister's Boyfriend Film's Teaser Announces More Cast\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4544,"outputTokens":2507,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1785977880,"createdAt":"2026-08-06T00:40:47.000Z","publishedAt":"2026-08-06T00:42:23.000Z","updatedAt":"2026-08-06T00:40:47.000Z"},"cluster":{"id":"c_fe2a835be4a38b0d908abb8f","canonicalTitle":"News\nLive-Action My Sister's Boyfriend Film's Teaser Announces More Cast","representativeArticleId":"a_11690ffee9fbb3cb71dceefb","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"My Sister's Boyfriend\"],\"studios\":[],\"people\":[\"Rinka Kumada\",\"Reo Matsumoto\"],\"type\":\"announcement\",\"domain\":\"other\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-08-05T01:02:24.000Z","lastSeenAt":"2026-08-05T01:02:24.000Z","updatedAt":"2026-08-06T00:42:23.000Z"},"attribution":[{"source":"Anime News Network","url":"https://www.animenewsnetwork.com/news/2026-08-04/live-action-my-sister-boyfriend-film-teaser-announces-more-cast/.240290","title":"News\nLive-Action My Sister's Boyfriend Film's Teaser Announces More Cast"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["My Sister's Boyfriend"],"studios":[],"people":["Rinka Kumada","Reo Matsumoto"],"type":"announcement","domain":"other","is_roundup":false},"keyFacts":null}