Seduced by My Childhood Sweetheart

Episode 1

Senna's father makes a decision without asking her: he hands her apartment keys to Klaus, her childhood neighbor, so the boy can move in while he starts his freshman year. Senna is furious that no one told her. Her dad only laughs it off, reminding her that she and Klaus grew up together and are finally in the same city again. Senna insists it's late and she needs sleep, but the damage is done — Klaus is already part of her life again, whether she likes it or not.

Episode 2

Klaus moves in, and Senna lays down house rules right away: no walking around half-dressed, lock the doors, remember there are roommates. Klaus teases her, acting far too bold for a kid starting college. Senna shuts it down, threatening to ship him off to a dorm full of sweaty freshmen if he keeps it up. He immediately backs off and begs to stay. She shows him his room, while her roommates sleep. Klaus watches her in a way that hints he's not nearly as harmless as she assumes.

Episode 3

Senna introduces Klaus to Mike and Joan, explaining he was her neighbor growing up and needed a place to stay. Talk turns to Klaus and Senna's old engagement — an informal arrangement their families wanted, broken when he moved away when she was young. Klaus needles her about how cold she is with him while she softens around Mike. Then he catches Mike and Joan together by the front door and quietly tells them he'll keep their secret — for a price. He's already looking forward to collecting.

Episode 4

Klaus holds Mike and Joan's affair over their heads, making clear he intends to cash in on what he knows. Meanwhile, a very drunk Senna stumbles home and Klaus has to steer her to bed, exasperated and protective. She mumbles that she's tired, and he refuses to let her keep drinking like this. The tension between them sharpens: she still treats him like a child, but Klaus is watching her like someone with a plan — and leverage he has no intention of wasting.

Episode 5

Klaus needles Senna about where she's going so early. She snaps that she's not ten anymore and nobody has called her by that old nickname in years. She tells him she starts her internship at James Group this morning. Klaus insists on driving her, joking he'll hold her clothes hostage so she can't leave without him. At work, Senna is thrilled — she, Joan, and Mike all landed spots at the industry's top company. Her boss greets her warmly, and a mysterious figure says all the information he needs is ready.

Episode 6

The new CEO has been quietly searching for someone — and she's been right under his nose. He orders that no one reveal what he asked, so she isn't scared away. When his staff asks who she is, he says she's his fiancée, engaged since they were kids. He refuses to hand her a permanent position through favoritism, insisting she's talented enough to earn it herself. At the office, Joan dumps her charts on Senna, and Senna ends up doing Joan's work to save the whole department from punishment.

Episode 7

Klaus offers to pick Senna up and grab food, but she's buried in work and has to stay late. The CEO notices interns working overtime and sends someone to investigate. Joan corners Senna again, begging her to finish just a few more charts and promising dinner at the fanciest restaurant. Senna hesitates but caves, calling Joan her dearest friend. Joan bolts immediately. Someone then taunts Mike about kissing his dear fiancée, making clear the affair is far from over.

Episode 8

Joan brushes off the tension, insisting she and Senna are best friends and that Senna helps with her work. The CEO orders security upstairs and pushes the planning meeting to ten the next morning. Then Klaus appears at the office, having sneaked in to keep Senna company while she works late — and gets caught by security, who check his access. Senna is startled to see him. He claims he came to pick her up, but his real reasons for being there stay hidden.

Senna keeps trusting the wrong people while Klaus quietly closes in. Watch how far he'll go to protect her — and what happens when she finally learns who he really is.