One day, Shota's father unexpectedly brings home his remarried partner Yui. Shota, who is happy to finally have a new mother, is overjoyed to see Yui's big butt. However, Yui becomes fed up with Shota, who is so obsessed with her butt. Shota's repeated naughty actions on Yui's butt increase day by day, and Yui finally reaches the limit of her patience. The manga version of "Shota-kun's H Mischief" is now available on e-book!