The relationship of the Subject-tan subjects (episode 11)

It seems we have the relationship with the user, but we are still the Subject-tan subjects, because we have to bond with the user!

Math-chan has news to the Subject-tan subjects, and it's says they have a relationship with the user. Biology-tan did not notice it, except Physics-tan. Will they solve the problem?

It is the eleventh episode of Trouble Math (series).