Otatomo ga Kareshi ni Nattara Saikou Kamo Shirenai

Akari is a closet otaku of 2.5 dimensional idols. One of the things she looks forward to in life is her otaku activities with Onda, a fellow 2.5D idol otaku who looks scary but is at heart, actually like a maiden who is madly in love when it comes to his favourite idol. They go to viewing events, handshake events, collaboration cafes and also collect trading goods together.