Granted she can’t prove Lila planted the necklace in her locker. But come on, how can she cheat when the test answers were stolen after the exam? The lockers are unlocked. And if Lila had seriously fallen down the stairs she would have more bruises than a knee injury!
In face of a righteously angry Ladybug, who points out the flaws they were too idiotic to see, the principal does what he does when face with influential threats (Chloe calling her dad), he caves.
Marinette is brought back to school with an apology. Lila is called back to school to continue investigating.
Unwilling to let such a useful pawn leave, Gabriel vouches for Lila, unaware that Ladybug had just left, and lets Nathalie disable the security feeds. Again the weak principal gives in.
Lila learns Marinette has already been brought back, but let’s Adrien think she fulfilled her end of the deal.
While Adrien had played a small, inconsequential role in defending Marinette, it did nothing to soothe Marinette to watch him pose with Lila after all he knew about that liar.
Betrayed and heartbroken, the love in Marinette’s heart starts to turn to hatred.
Welcomed back to school, Marinette asks Adrien in private why he modelled with Lila and he says it was part of his job (he doesn’t want Marinette to feel indebted). Lila butts in and insists that it is also because they are friends. Adrien agrees with Lila. Marinette believes Adrien wants to shrug things off again, and move on.
Her hurt confirmed, Marinette ignores Adrien and gives him the cold shoulder. The hatred in her heart has sprout and is growing into a sapling
Adrien can guess the reason for that. He tries to talk to Marinette alone but she wants nothing to do with him. Eventually he manages to convey that he only modelled with Lila to get her to come back to school.
Marinette retorts that he didn’t get her back to school. Ladybug did! And she doesn’t tolerate liars. He had the chance to tell the truth and he blew it.
Normally, Marinette may have been more open-minded but the hatred in her heart has had time to settle.
The more you love someone, the deeper that hatred can grow.
Since Lila didn’t hold up her end of the bargain, Adrien renounces their friendship in public. He admits he made a deal with Lila to get Marinette back but Lila spins a lie that she asked Ladybug to bring Marinette back. Adrien protests that Ladybug herself confronted them that she is not Lila’s BFF. The class doesn’t know who to believe. But since Marinette is clearly avoiding Adrien and still thinks Lila is a liar, it gives Adrien more credibility and makes them wonder if Lila was indeed a liar.
Marinette still hasn’t forgiven Adrien, believing he is only acting up since he doesn’t want to lose any Friend. Her heart is too full of hatred for her head to think clearly.
It pains Marinette to see Adrien but she eventually becomes adept at ignoring his blonde head and presence. Adrien is miserable that he has lost one of his closest friends. Even so, he snaps at the class whenever they listen to Lila’s gossip. Marinette ignores his attempts to protect her.
The rest of the class do not intercede. Marinette has a right to be angry with Lila and she shuts down anyone who asks her to be open-minded and forgive either Lila or Adrien. The class soon learns not to bother, otherwise Marinette shuts them out too.
Tikki tries her best to change Marinette’s mind but Marinette snaps at her to let it go. Tikki relents once she realizes she is only agitating Marinette and making her akuma bait.
Adrien tries waiting outside the bakery, skipping his practises and getting grounded. Marinette had told her parents not to let Adrien or Lila in. Adrien refuses to budge, standing in the heavy rain even when it is clear the bakery is closed and the streets are emptying. The Gorilla eventually tracks Adrien down and drags him home. (I figure Adrien is a romantic and is willing to resort to grand gestures of his determination to see Marinette)