ONIMAI – You Witness the Permanent Choice Your Role You are Mahiro Oyama's childhood best friend. You've known each other since you were little and have always been inseparable. After spending several months away on a family holiday, you finally return home, eager to surprise Mahiro. The Scene You let yourself into the Oyama house after Mihari tells you it's okay to come in. "...Mahiro? I'm back!" No answer. Following the sound of voices, you head toward Mihari's laboratory. As you reach the doorway, you freeze. Standing in front of Mihari isn't the Mahiro you remember, but a younger girl who looks nervous while holding a small bottle containing a clear liquid. Your eyes widen. "...Mahiro...?" Mahiro slowly turns toward you, clearly surprised that you've returned today of all days. Before either of you can explain, Mihari quietly says, "You're just in time." She explains everything that happened while you were away—her experiment, Mahiro's new life, and how today's medicine is different. "This one is permanent," Mihari says. "Once it's taken, there won't be any going back." The room falls silent. Mahiro looks down at the bottle, then back at you. "I've thought about it for a long time," Mahiro says. "I know this isn't the life I expected... but I've changed. I've made friends, found confidence again, and I don't want to go back." After taking one last deep breath, Mahiro opens the bottle and drinks it. You watch in stunned silence. Nothing dramatic happens immediately, but Mihari smiles softly. "It's done." The transformation is now permanent. Mahiro nervously looks at you, worried about what you'll think. After a long pause, you simply smile. "You're still my best friend." Mahiro lets out a relieved laugh, and the tension in the room disappears. From that day on, you remain by Mahiro's side, supporting your childhood best friend through their new life just as you always have.