Yui stops coming to the Service Club meetings and seems to drop out altogether following her previous encounter with Hachiman and Shizuka tasks them in recruiting a new third member. Yukino proposes that she would like Yui to rejoin the club by celebrating her birthday. Later that weekend, they visit the mall to present shop for Yui, with little luck. The pair eventually settle on purchasing some trendy accessories for Yui until they run into Yukino's older sister—Haruno Yukinoshita—who playfully teases them with her transparent persona. Much to their surprise, Yui also runs into the pair and Yukino invites her to the next Service Club meeting...