Takuma and Mayu have loved each other since they eight years old, having met while Mayu's father treated Takuma at the hospital for his heart condition. One night Mayu overhears her father explaining that Takuma will probably die before he turns twenty years old, and that Takuma doesn't even know yet. Devastated and desperate, Mayu goes with Takuma to search for a four leaf clover to wish for a miracle. When they can't find one, Takuma makes the worst promise possible: to marry Mayu when they both turn twenty. Takuma eventually realizes he cannot keep his promise and to avoid hurting Mayu, he distances himself from her. However, when Takuma can no longer avoid Mayu, what will become of the two childhood friends?
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|Boku wa Imouto ni Koi wo Suru||2003|
|Boku wa Imouto ni Koi wo Suru||OVA||2005|
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