Shu's relationship with Ruri has been neutral at best. Although both can be seen tagging alone whenever their best friends are absent, Ruri shows complete annoyance over Shu's antics and pervertism. As comic relief, Shu would be the target of Ruri's constant abuse each time Shu commits lecherous behavior. But even so, Shu considers Ruri a valuable companion; due to each other's commitment to their friends. Even Ruri herself would occasionally respect what Shu has to say, even finding his words profound. Throughout the anime series, there are only a few instances where the two can be seen in a romantic light, such as the time where Ruri felt stoically annoyed when she learned that Shu received two love chocolates on Valentine's Day. Overall, both Ruri and Shu consider each other as "glasses