Onegai desu kara Uketekure

An entire year has passed since she entered high school, but Chikage Kurokawa is still an aggressively shy loner. In order to acquire friends, she endeavors to utilize the power of laughter—and thus she forms a laughter-bringing tag team with him, the unpopular Makoto Fujisawa!? The aim is a dramatic turnaround: leaving this loner-life behind! So, please laugh, please!

(Source: Champion Cross, translated)