A special 14-page chapter included in the official art book.
Ibara who has now entered her second year of middle school has started her rebellious phase, becoming a problem child who troubles her brother... or so it appears. In truth, all she wants is her brother's attention. Source: MU
A short 5-page bonus chapter set just after the Final Exams where Ochaco Uraraka confronts Katsuki Bakugo on his attitude towards Izuku. (Source: My Hero Academia Wiki)
On the Japanese island Magonia lives an artificially created chimera. This chimera was created by Dr. Nashiki. What conclusions did he draw at the end of his taboo research? (Source: Shueisha, translated)

