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)

When the otaku who has transformed into Yoshino is lost on the street with Yoshino, they are met by Nozomi Tojo from the Muse and taken home. What will happen in the cohabitation life of our timid and shy Yoshino and Nozomi Tojo?

Wendy: Don't be fooled by her cold exterior; she's actually gentler than anyone else. Klee: Diregie is a good person; her grilled fish is delicious. Jean: You don't need to worry. If you're willing, I believe everyone in Mondstadt will accept you. Diluc: I must admit, her arrival has brought a lot of peace to Mondstadt. Want a drink? This one's on me. Rosalia: I no longer believe in the Anemo! I will pledge my allegiance to you, Lady Diregie! Luminous: Will you become my companion and adventure with me, Diregie? I... need you. Looking at the outstretched hand, Diregie chuckled, "Really... I can't do anything with you. I'll accompany you for a little while, and let me witness the end of your journey."

Save the world? Ha! What I want is friends! I want real friends! Why are you looking at me with such strange eyes! Don't come over here! I clearly treat you as a friend! But you want to push me down! This is a story about becoming Inaba Tsukuyō and being commissioned by Alaya to save the world.