Ruri★Tunes is a rhythm game still in beta, where the demon brothers dive into the world of Ruri Hana! Tap the screen at the right time to take down approaching enemies. This mini-game was originally showcased at Anime Expo 2022.
There was a beta testing phase that lasted from 2022/9/26 22:00 (PDT) ～ 2022/10/3 23:00 (PDT).
For more details on the now ended beta testing, visit the Official Shall We Date website.