The "Karaoke no Tetsujin Collaboration" (sold by Tetsujin Enterprises) based on the "Hallelujah Baby" (KOJIMA RARA) serialized in Kimi Koi has been announced.

The "Karaoke no Tetsujin Collaboration" will feature collaborative drinks, set menus, and merchandise.
In addition, concept rooms will be available at three other locations nationwide (Ikebukuro Higashi Exit Store, Osaka Namba Store, and Fukuoka Tenjin Store).

Concept rooms can be reserved through a dedicated form, and reservations will be accepted from 18:00 on October 17, 2025 (Fri.).

The sales period (holding period) is from Friday, October 24, 2025 to Wednesday, December 31, 2025.
Sales will also be available via EC from Thursday, December 25, 2025 to Thursday, January 15, 2026.

Official website URL: https://www.karatetsu.com/animegame/hallelujahbaby2.shtml