Matsutaro is officially a sumo wrestler, having made his aggressive debut. But his rowdiness hasn't subsided, not one bit. When his senpais decide to throw a party for the ailing master of Raijin stable, Matsutaro is not invited; though Tanaka is invited, he decides to stay with the rejected outcast, not because he feels sorry for him, but because his master told him to keep Matsutaro out of trouble.

Nine Magic University Affiliated High Schools around the country are preparing for the upcoming Nine Schools Competition. The Student Council needs to select engineers. Since Tatsuya knows how to fine-tune CADs, will he take on the role of an engineer?

Ene recounts how she knows Ayano, the former commander of the Mekakushi-Dan, and startling connections between the group’s members continue to emerge.

During the Christmas market, Balder and Loki face off before Yui. Loki tells a bewildered and concerned Yui to stay away from Balder, and at this rate, they'll both get hurt. Surprised, Yui tries to question Loki, but Balder resents Loki for his interference and uses his divine powers--?!

Surprisingly, Raku and Chitoge give a great performance as Romeo and Juliet. After the play, it looks like things are back to normal between Raku and Chitoge. Does this mean that Raku will finally choose the girl he wants to be with?

The Alchemist has already committed four murders, but Kindaichi is determined that there be no more. He also wants to prove Reika-chan's innocence, since her fellow entertainers have seen fit to tie her up in the meantime. Can Kindaichi solve the twin mysteries of the locked room murder and the vanished sword?