{"rewrite":{"id":"r_ee462a1a30d2edd861d933d0","clusterId":"c_b4f232ff9fc8658ecee6c4a6","slug":"my-sister-s-boyfriend-live-action-film-taps-timelesz-for-theme-song","model":"deepseek-v4-1-flash","headline":"My Sister's Boyfriend Live-Action Film Taps timelesz for Theme Song","summary":"The live-action film of Amu Meguro's manga My Sister's Boyfriend has a new 60-second trailer that previews its theme song, \"Honto no Koto o Iu to,\" by timelesz. The film stars timelesz member Masaki Hashimoto as Midori Yukishiro and Runa Nakajima as Sui Sanae. Mahito Kimura directs from a script by Nami Kikkawa, with Shochiku planning, overseeing, and distributing. The film opens in Japan on December 4.","whyItMatters":"Pinning a timelesz member to the lead and the group to the theme song ties the film's marketing to one idol fanbase, which is the clearest signal yet of who Shochiku expects to fill theaters on December 4.","webCardHtml":"\u003cp\u003eThe trailer runs 60 seconds and arrives with character posters for the film. Masaki Hashimoto plays Midori Yukishiro, the older sister\u0026#39;s boyfriend who becomes Sui\u0026#39;s home tutor, and Runa Nakajima plays Sui Sanae. Rinka Kumada is Momo Sanae, Sui\u0026#39;s older sister and Midori\u0026#39;s girlfriend, and Reo Matsumoto is Sui\u0026#39;s childhood friend Ayame Mizukawa. Taisuke Niihara plays Amamiya, a new assistant producer at the TV station where Momo works.\u003c/p\u003e","blueskyPost":"Masaki Hashimoto voices the theme song and plays Midori Yukishiro in My Sister's Boyfriend, so timelesz's single and the film's lead performance share one member's schedule.","twitterPost":"timelesz's theme song for My Sister's Boyfriend features Masaki Hashimoto, who also plays Midori Yukishiro in the film.","threadsPost":"My Sister's Boyfriend pairs timelesz's new song with a cast that includes the group's own Masaki Hashimoto as Midori Yukishiro. The 60-second trailer sells the song and the lead performance as one package, tied to the December 4 opening.","newsletterBlurb":"The live-action film of Amu Meguro's My Sister's Boyfriend posted a 60-second trailer that previews its theme song, \"Honto no Koto o Iu to,\" by timelesz, along with character posters. Masaki Hashimoto of timelesz plays Midori Yukishiro and Runa Nakajima plays Sui Sanae, with Mahito Kimura directing for Shochiku. The film opens in Japan on December 4.","attributionJson":"[{\"source\":\"Anime News Network\",\"url\":\"https://www.animenewsnetwork.com/news/2026-10-21/live-action-my-sister-boyfriend-film-trailer-unveils-song-by-timelesz/.243083\",\"title\":\"Live-Action My Sister's Boyfriend Film's Trailer Unveils Song by timelesz\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":4636,"outputTokens":668,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1792649232,"createdAt":"2026-10-22T06:02:47.000Z","publishedAt":"2026-10-22T06:06:07.000Z","updatedAt":"2026-10-22T06:06:07.000Z"},"cluster":{"id":"c_b4f232ff9fc8658ecee6c4a6","canonicalTitle":"News\nLive-Action My Sister's Boyfriend Film's Trailer Unveils Song by timelesz","representativeArticleId":"a_25b3c972228646ce782b10a8","sourceCount":1,"writtenSourceCount":1,"writeAttempts":0,"isSolo":true,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[\"My Sister's Boyfriend\"],\"work_titles\":[\"My Sister's Boyfriend\"],\"studios\":[],\"people\":[],\"type\":\"news\",\"domain\":\"manga\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-10-22T02:21:11.000Z","lastSeenAt":"2026-10-22T02:21:11.000Z","updatedAt":"2026-10-22T06:06:07.000Z"},"attribution":[{"source":"Anime News Network","url":"https://www.animenewsnetwork.com/news/2026-10-21/live-action-my-sister-boyfriend-film-trailer-unveils-song-by-timelesz/.243083","title":"News\nLive-Action My Sister's Boyfriend Film's Trailer Unveils Song by timelesz"}],"entities":{"anime_titles":[],"manga_titles":["My Sister's Boyfriend"],"work_titles":["My Sister's Boyfriend"],"studios":[],"people":[],"type":"news","domain":"manga","is_roundup":false},"keyFacts":null}