All the students of Class 3-4 of Sosoji High School are Honeko Akabane's bodyguards, and as one of them, Arakuni Ibuki's job is to find the traitor hiding in the class. Arakuni is protecting Honeko while searching for clues about the traitor during the school trip, but in his room at the hotel, he encounters a drunk Masachika. She shouldn't even be in Kyoto with them! Then, Masachika, wanting to steal Arakuni's love, has the audacity to kiss him! What's more, Honeko witnesses the moment...?!