Mimi, who works as a VTuber named "Tsubomi," and Kazuki, a fan of "Tsubomi" and an illustrator, start to interact offline when Kazuki comes to Mimi's high school for her teaching internship. During this time, it is revealed that Mimi has actually known about Kazuki for a while...? A fan being a student and the admired illustrator being the teacher... what happens next!? A new sensation of VTuber × yuri romantic comedy, the concluding Volume 3!