Hiroshi Watanabe is dissatisfied with his married life with his wife of 10 years, Satsuki, and is having an affair with Reina Saeki, who is a great talker and never gets bored. On a day off, Hiroshi is reluctantly invited by Satsuki to join a bus tour. However, it turns out to be a spiritual online salon that Satsuki is into. Moreover, the "teacher" of the salon is Raina, his adulterous partner... Hiroshi is in turmoil! On a bus with nowhere to run, sandwiched between his mistress and his wife, a bus tour with secrets that should never be exposed begins....