The Little Lion (or: how Felix stole his nephew from a terrorist)

When his sister, Emilie went missing, Felix Culpa didn’t know what to do. He saw on the news that Adrien (the nephew he never met) was still with Gabriel, and his big sister would never run away and let her son with that man. Still, he left his apartment and moved back to his parents’ house, vacant ever since their deaths.

Two years later, he comes back to the apartment, finds out that his sister left him a letter, and that Gabriel Agreste is much worse than the man that stole his sister and never let him met neither her or her baby.

Or; Adrien misses his mom, Gabriel Agreste is blackmailed by the brother-in-law he forgot about, and Bridgette just wants Felix to sleep more.