We follow Shige, a naive man who was always focused on mathematics, as he spends the 24 hours leading up to that thing he does with his childhood friend☆ One day, Shige is shocked when he sees a video of someone doing "that thing" on his smartphone. This is because, at the age of 18, he has never learned how to do that thing before! Whenever he sees his childhood friend Goto-chan, he always feels an urge to do it with him... Was he unconsciously thinking that he wanted to do that thing with him? Since then, whenever Shige sees Goto-chan, he is reminded of that thing and ends up avoiding him... Will the two be able to do that thing within 24 hours? A love comedy about a high-spec math nut and a kuudere childhood friend who long for each other!