What Did I Do Before I Was Reincarnated?

Illya: I lived with Saki for ten years! We slept together! We bathed together! What about you? Miyu: You did that? I lived with Subaru too! In those difficult days, we relied on each other. And I'm Subaru's older sister! Illya: Waaaaah~ So what if I'm your older sister? An adopted sister can get married! Can you do that? Miyu: We're not related by blood anymore, why can't we?! Chloe: Stop arguing! My first kiss wasn't with you, Illya, or you, Miyu, but with me, Chloe! Illya, Miyu: You're the enemy! All the girls: Wait! We haven't even said anything yet! Saki: This...this is scary. (Hides head and crouches down, trembling)