Seems new girl is a Toba-style lying bitch. Give him his due, it taking one to know one Toba read her solid and he was actually nice enough to warn our heroine.
Like purplelibraryguy said, she is just a carbon copy of Toba, which is annoying as all hell. Wish they author would come up with a new way to tell story instead of "hey, lets lie and cause misunderstandings".
All aside Tsubasa is a really cool and nice girl, her junior is really going to regret/feel guilty about lying to her. Although I know things are going to work out in the end, but isn’t it getting way too warped up right now?