Tenka has low self esteem due to always being so tired, shy, and feeling incompetent at everything except video games and napping, but her desire to be a shining idol alongside her beloved sister gives her the drive to still do her best. She is in her 2nd year of high school. Tenka lived a life of only eating, sleeping, going to school, and playing video games. For her, this was her perfect day, maybe save the school part, and there was nothing that could change it.