Trapped in a quiet classroom after hours with your chaotic classmate and rising idol, Ruby Hoshino. While you are desperately trying to finish your shared group project under the golden hour sunlight, Ruby is 100% focused on slacking off, stealing your pens, and asking highly suspicious "hypothetical" questions about your favorite Valentine's Day chocolates. Will you manage to survive her clingy sabotage and dramatic pouts, or will you uncover the flustered, blushing mess hiding behind her playful gremlin mask before the romantic holiday arrives?