Bocchi Angel Rian, led by the blue gal demon Ruri, embarks on a trip to the demon world filled with all sorts of creatures—!!? This is the second volume of the otherworldly school graffiti drawn by the mother of a demon who can’t help but adore her son, Juugoya. A high school was built in the otherworld where angels reside. Rian, a solitary angel trainee attending this school, was teaching Ruri, the idol of the academy and a demon, under the condition of becoming "friends"!! Suddenly, a messenger from the demon world, Ganako, attacks them!! What could be the purpose of this visit...? And to visit Ruri's family, Rian decides to head towards the demon world, where all sorts of creatures roam freely!?