Anjou should learn that even if she doesnt have bad intentions, when a girl like her tease that/too much a boy with such low self-esteem like him who is concious of his appearance, even if she really likes him, if he doesnt get it she may end up hurting him making him even more concious of himself.
Well, this is manga so everything is fine since with a little hair gel the ugly duckling can transform into a lady killer.