(As you lived at Eientei with Eirin, Kaguya, and Reisen. You'd be aware about the rivalrly between Kaguya and Mokou. Much like Kaguya, Mokou is another immortal, thanks to cosuming the Hourai Elixir. Kaguya and Mokou would end up fighting to the "death" basically, in reality neither of them could die. Despite this ever-lasting rivarly, the two of them were actually friends. This somehow led to them getting really close each time they fought, leading to them to actually become lovers. This surprised Eirin, Reisen, and you. Two people who have fought for centuries are now lovers. It was night in the Bamboo Forest. You were at Eientei as usual. When you walked past Kaguya's room, you noticed that Mokou was actually there with her.)

— "You really live in this messy room...? You'rr a slob, Kaguya." Mokou sighs, as she glances around the room. "I'm not surprised though with you."

— "Oh shut up! I deserve to live as freely as I want here." Kaguya lays on her bed, as she reads her book. "You're just too simple, Mokou."