I'm gonna try and update more.
Summary: Marinette goes back to Adrien's house but it doesn't make anything better as Adrien and Chloe go on a date.
Unable to get in contact with Marinette's dad, Marinette and Adrien go to his house. They're greeted by an upset Felix, who's complaining that his room is gone again because of Marinette. Before they can even ask what he's talking about, Nathalie comes outside and explains that someone signed the lease to their house the day before Dad was supposed to sign. Adrien doesn't seem to be buying his mum's story though as she says that until they can find a new house, Mari and her dad will stay with them.
Marinette feels like she will be burdening Adrien, but Nathalie says it's fine since they'll be family soon and says she knows about the kiss. Felix gapes in shock, asking his brother if it's really true. Adrien doesn't deny it, but he looks at Marinette accusingly. She denies being the source and asks Nathalie how she knows, but she doesn't tell.
Back in her old room, Nathalie asks how Marinette's relationship with Adrien is going. Marinette says she has the wrong idea; even though they kissed, the two have never even held hands or been on a date. Well there's no time like the present and Nathalie tells her that scoring a date is her new mission. That's a lot easier said than done.
Marinette finds out that Mylene and Rose told Nathalie about the kiss. Nino happens to overhear them and is outraged that Marinette and Adrien have kissed. He asks if Marinette is still planning to give up on Adrien, but Marinette honestly answers that she can't. Nino becomes sad, but he accepts it and leaves.
Mylene says it's better for Nino to move on since Marinette can't give up on Adrien and she has a lot of obstacles in her way. That discourages her even more, since Adrien has been as unreceptive to her feelings as she's been to Nino's.
All the same, Marinette hides out in front of Adrien's department, spying on Chloe and Adrien, only to run into Kim, who's doing the exact same thing.
Marinette realizes he likes Chloe, but since any time someone figures something out they say it way too loud, Kim tries to keep her quiet. He accidentally twists Marinette's bad ankle and send both of them toppling. Kim lands on top of Marinette, right in front of Adrien and Chloe. Never one to pass up an opportunity, Chloe says that the rumors about Marinette giving up on Adrien for Kim must be true since they're together like this in broad daylight.
Marinette quickly tries to clear up the misunderstanding, but Adrien says that it has nothing to do with him. But then he adds that he'll go to the movies with Chloe on Sunday. Not that it has anything to do with Marinette. Nope, not at all.
Of course, Kim and Marinette can't accept this, so they plan to spy on the two and ruin their date. Rose and Mylene think it's a bad idea, but Marinette can't just let it go. She asks them to keep quiet about it though, since she doesn't want Nino to know.
Nino is already two steps ahead though; he's bugged their table and is listening from a storage room. He's only able to catch a few words though, so he thinks that Marinette really is going on a date with Kim. He tries to figure out where the date is based on the places he heard and turns to his Friend at the restaurant for help
Mari's dad apologizes for not being able to find a house and burdening Marinette to be around Adrien again. He's been looking for a house, but every time he's about to sign the lease, someone else signs before him. Nathalie's contacted every real estate agency in London, to which they don't know.
Marinette thinks about Chloe and Adrien's upcoming date and tells her dad it's fine. She's in love with Adrien and even if he isn't returning her feelings, she doesn't want to give up. To do something half-heartedly isn't like her and she realized that after leaving how much she values these feelings. She assures him that even if she gets hurt, it's better than not doing anything and regretting it later. Dad realizes that it's futile to argue with Marinette and says she's too much like him.
Sunday comes and Marinette is getting ready. She spends time picking out outfits, putting on make-up, and doing her hair. Um, you do know that you're not the one going on a date today, right? Thankfully, she does and she thinks wistfully about what a date with Adrien would be like. Putting on make-up, wearing nice clothes, a romantic movie, going shopping, and a high-class dinner would be the perfect date.
Kim and Marinette meet up and spy on Chloe and Adrien from a distance. Kim asks if Adrien is quick with girls. Marinette says he's not good with them at all, but Kim says that's because it was her. Kim's words almost seems true as Adrien compliments Chloe's clothes, much to Marinette's shock.
While Kim and Marinette are busy being the worst spies ever, Nino's workmate takes him to an erotic theater, saying that obviously Marinette and Kim will come here and then go to a hotel. Nino's determined to keep that from happening and stations himself outside the theater.
Kim and Marinette sit behind Chloe and Adrien at the movie theater, pretending to be an old couple. Whenever Chloe tries to make a move by leaning on Adrien or holding his hand, Marinette manages to thwart her, using a magazine to block her head and throwing popcorn on her.
After the movie, Chloe and Adrien go grab some tea and she asks Adrien what his ideal type of girl is, catching Marinette's attention. Marinette looks over eagerly as Adrien says that his ideal girl is beautiful, with a great body, and smart. Oh, and she has to be able to cook. In other words, Marinette's complete opposite. Kim tries to comfort her by saying that there's definitely something good about her, pointedly looking at her chest, but Marinette doesn't want his sympathy.
Chloe and Adrien decide to go shopping next. Kim and Marinette watch from outside the store and Kim gets a nosebleed when he sees Adrien zipping up Chloe's dress. Adrien picks out a necklace for Chloe and Marinette sighs in envy; she's lived with him for so long but he's never given her anything. They both start to freak out at the skinship between Adrien and Chloe as Adrien puts on the necklace, but Marinette admits they make a good couple.
It's only when a bicyclist almost runs over Chloe and Adrien saves her that Marinette decides to give up. She doesn't like seeing Chloe and Adrien together, and if they both like each other, there's nothing more she can do. Kim tries to persuade Marinette to stay, but she only wants to go home.
Unfortunately, Marinette bumps into a man while leaving, making him splash his drink all over his shirt. Angry, he throws the rest of the drink on Marinette and asks how she plans to pay for his expensive shirt. Marinette apologizes as Kim offers to pay for the dry cleaning, but the man says that won't nearly be enough. He looks over Marinette, saying there are other ways to pay and starts to drag her away. Marinette thinks that this must be her punishment for trying to ruin someone else's date, but Adrien comes to the rescue.
He says his shirt is obviously cheap, riling the guy up even more. He tries to hit Adrien, but he easily dodges all his punches. Hilariously, Marinette and Chloe squeal together on the sidelines at how cool Adrien is before remembering they hate each other and separating.
Adrien takes a tennis racket from a passerby and tosses it to Kim. He says he knows they were following them all day and tells him to take this chance to impress Kim by showing how cool he is. He grabs Marinette, only giving Chloe a small apology, before running off. Tennis racket in hand, Kim the Demon emerges and he takes on Angry Shirt Guy, though Chloe looks less than impressed.A
Adrien and Marinette ran in sloooooooow motion (well that's what it felt like), it looked so romantic until Marinette fell on the floor, face hit first.
Adrien helps her back up (still in sloooow motion), grabbing her hand, and they keep running. And running. And running. And running. Marinette can hardly believe she's running with Adrien and wishes time would stop right now.
They finally reach a river and stop running, completely out of breath. Marinette asks Adrien if she knew she was following him. They were so obvious he noticed them as soon as he arrived at the meeting spot. He had thought Marinette and Kim were really dating until he saw them and realized Kim was in love with Chloe.
Marinette apologizes for following them and tentatively starts to say she'll accept it if Adrien really likes Chloe, but Adrien cuts her off, asking if she wants to go somewhere. Of course she does, but everything she wants to do are things Adrien already did today with Chloe. Even if they did go to dinner, Marinette can't go anywhere with that big stain on her dress.
They end up walking around town. Marinette runs off when she sees the bridge, amazed by the sight. She's so excited that she belatedly realizes that Adrien is nowhere to be seen. She runs around, trying to find him with no luck. The sun's setting when she wanders back to the river and she wonders if Adrien has played a trick on her again. If so, that is the worst trick ever.
Luckily, Adrien shows up, bearing food since they couldn't go to a restaurant. It's only a hamburger, but Marinette thinks that it's better than any food from a fancy restaurant.
Adrien says that he's never experienced trouble before. But ever since that day she gave him the love letter, every day has been nothing but trouble and frustration. He feels like Marinette is a trial that was given to him and because he panicked at the first trial given to him, he was trying to run away from it.
But he thinks life is more interesting with problems and thanks her. Adrien's was feeling so awkward, he can't even look at her when saying thank you. Marinette doesn't really understand what he means and tries breaking down his words, coming to the conclusion…that he wants to marry her.
He only meant that he's not bothered by living with her. She asks if that means he doesn't hate her. Adrien: "I have trouble being with you, but I don't hate you."
Marinette's so overwhelmed with joy that she starts crying. Adrien's words of comfort: "Your face will get dirty." At least he gives her a handkerchief.
Meanwhile, Nino's still waiting at the porn theater, wondering where Marinette is.
As Marinette cleans up at home, she thinks that her first date with Adrien was nothing like what she thought it would be. But more than when they kissed or when he had carried her, she felt much closer to Adrien. Her happiness is short-lived however, when she overhears Adrien's parents accepting his decision to move out.