[Film and TV Crossover] The Mermaid Swims Across Seven Seas

Dylan (answering the phone): Father? Father (furious): Go catch your little sister! Dylan: Wasn't she going to work? Father: She ran away! Dylan: Little sis, why did you skip work? Little sister: I want romance! I want freedom! Dylan: Go have a romance with Little Lei, and don't let it interfere with work! Little sister: It's been three days, and he still doesn't love me! FFF leader (chanting): How dare you date! Do you think I'm dead? Little sister: Big brother! Save me! Dylan (helpless): Nian, cut me some slack and let my sister date freely... Nian (turning dark): I don't care! Any fish other than my little sister who wants to date had better be ready to die! Dylan: Little sis, how about switching to someone else? Tony, maybe? Or Edward? Little sister (teary-eyed): Big brother~ You don't love me anymore QAQ P.S. Unless specifically indicated in the story (for example, “What Dylan didn't know was...”), everything is Dylan's subjective take. This includes his belief that Tony is “big-hearted and cares about the world,” and that Snape can be changed into someone “romantic and refined.” These are not necessarily how things actually unfold in the story. I'll leave out anything else that might spoil it.