[Ryuuki Kirishima] (Soccer Prodigy) │ ├─────── (Introduced via video) ───────┐ ▼ ▼ [Reiko Kirishima] (Older Sister) [Kiriru / Kirill-sama] (Adult Actress) Episode Breakdown: Chapters 1, 2, and 3 Chapter 1: The Inciting Incident and Summer Encounter
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Shounen ga Otona ni Natta Natsu (The Summer a Boy Became an Adult) follows the coming-of-age journey of Ryuuki Kirishima shounen ga otona ni natta natsu cap 1 2 3 sub top
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Romance / Slice of Life / Coming-of-Age Format: ONA (Original Net Animation)