Mousou Telepathy - Vol. 3 Ch. 306 - Infectious Delusions

[MangaDex]

 

[Athengrim]

Were her own thoughts always in black and white? It caught me off guard since all other thoughts are colored

 

[Frostisss]

Were her own thoughts always in black and white? It caught me off guard since all other thoughts are colored

No. It’s a retcon. Some really early chapters have her thoughts in colour I believe.