Dengeki Bunko 25th Anniversary "Engage Princess" appeared in comics!
The stage is Dream World Maitopia. The big adventures of Marlin and Mysterious Rabbit begin!

Kotarou Hayasaka is a new student at Oomiya High School, a prestigious boys school where the student council president is able to make a single school rule at the beginning of the year. This year, the student council president Izuki Jinguuji decides that all the students have to cross-dress during school activities, much to Kotarou's dismay.

(Source: MU)