Yui is Hachiman's classmate. She is a cheerful, outgoing girl who becomes the service club's first "customer", asking them to help her bake cookies for "a certain someone". Her problems lie not with her personality, but with her inability to express herself due to fear in losing friends, and thus admired Yukino and Hachiman who are able to express their true feelings.

My Teen Romantic Comedy SNAFU (Japanese: やはり俺の青春ラブコメはまちがっている。 Hepburn: Yahari Ore no Seishun Rabu Kome wa Machigatteiru.), subtitled My Youth Romantic Comedy Is Wrong as Expected. and abbreviated as Hamachi (はまち?) and OreGairu (俺ガイル?), is a Japanese light novel series written by Wataru Watari and illustrated by Ponkan8. There are three ongoing manga adaptations and two anthology volumes. It has been adapted into an anime television series, which aired between April 4 and June 27, 2013 and was followed by second season which aired between April 2 and June 25, 2015.