Tsumugi-chan Wants to Make Seto-san Laugh

Seto-san is the pretty and cool class representative. Her laugh must surely be lovely... I wanna see it!! This is a short-format comic about Tsumugi-chan, a clumsy girl who has had some contact with Seto-san since the entrance ceremony, and who is determined to try various tactics to make Seto-san laugh, without success. But there's something strange about Seto-san's behavior!!! (Source: Kodansha, translated)