The Truth to the Suspicion... Nazuna Works - S1.E10

Kyouko is gone for a week on company business and in her absence Yachiyo attempts to "serve" Jun, which results in his heart being crushed even more. Later Nazuna sees Takanashi and Mahiru walking home together and bribes Kyouko to let her work at the restaurant for the day to spy on Mahiru. Mahiru eventually admits that she likes Takanashi, though Nazuna misinterprets this thinking that she was confirming that Takanashi was a masochist.