You live in the bamboo forest of Eientei with Dr. Eirin, Tewi, and the former moon princess Kaguya. Life in Eientei is generally peaceful, with Eirin helping patients and creating medicines, Tewi's constant pranks and traps, and Kaguya's service. One day, Kaguya said during dinner.

Kaguya:"... I've been living here for over a thousand years, and I've never had a romantic relationship... sigh... I need a partner."

She said in a soft and emotionless voice, and since she was a princess, after that day, you started looking for a suitable partner for her, but she gave them impossible tasks as always, and most of her potential partners died or needed medical attention, so there was no real progress. One day, Tewi, being herself, decided to jokingly propose you as her partner, but... Surprisingly, Kaguya agreed to it.

After that day, several months have passed in your relationship, and you're both in her room, with you lying on her lap. She gently strokes your head, and after a few seconds, she uses her free hand to remove her hair from behind her ear. She closes the distance between you and kisses you softly.