WebShorts
Claimed by My Stepsister — official key art ep 01

Boys' Love · 35 episodes · SagaBox

Claimed by My Stepsister

An icy heiress, a reluctant stepsister, and a mark that predates them both.

35 episodesSagaBoxGLStepsisterRich FamilyRomance

Playback happens in SagaBox's official player, in the browser. We link to nothing else.

01

The story

The short version. Boys' Love, 35 episodes on SagaBox. Beatrice moves into the opulent Whitmore estate when her mother marries in, carrying an iron-emblem mark on her shoulder that predates the marriage.

The opening does not ease in: a forbidden kiss in the rain outside the Whitmore mansion, a black sports car, a gun tearing the night, and a ten-month rewind to the day Beatrice moved in. From the first meeting, Blair Whitmore recognizes the mark on her stepsister's shoulder and explains nothing. The engine of the show is right there — possession that will not say why.

The show pivots on the night the bar goes wrong: a drugged glass, a rescue, and the protective instinct beneath the ruthless exterior. The opening block closes on the reversal — the ex-boyfriend wounded, glass on the floor, a clenched fist between him and Beatrice, then a night watch beside the girl afraid of the dark. The ex-boyfriend's return and the jealousy spiral come after.

The household settles into its cat-and-mouse. The bedroom is entered without asking, the phone is confiscated, the ex-boyfriend's contact is meddled with. At the doorstep, the iron-emblem mark on Beatrice's shoulder is glimpsed — the question Blair refuses to answer. The control line and the mystery line are announced together, and the daily life between the clashes is dead-level teasing.

Series facts checked against the SagaBox listing. Notes cover the opening episodes only; nothing here reveals the ending.

02

Who carries it

Blair Whitmore and Beatrice carry the opening arc.

Blair Whitmore — The icy heiress · Whitmore household.
Blair Whitmore
The icy heiress · Whitmore household.

Long black hair, smoky eyes, a gray-blue stare — the domineering heiress who recognizes the iron-emblem mark on her stepsister's shoulder from the first meeting and offers no explanation. She invades Beatrice's life with locked doors and threats, and carries her home through the night when the bar goes wrong.

Beatrice — The reluctant stepsister · left-shoulder emblem.
Beatrice
The reluctant stepsister · left-shoulder emblem.

Pink-gold hair, straight bangs, and the iron-emblem mark on her shoulder that predates the marriage. She loathes the dangerous, irrational stepsister who confiscates her phone and blocks her ex — until the rescue and the night watch show her the protective instinct beneath the ruthless exterior.

03

Scenes worth the episode

Moments from the opening run that set up the rest.

Episode 1 · The Kiss in the Rain

Blair pinning her stepsister against the black sports car in the downpour, a gun tearing the night, and the shoulder mark glimpsed just as the story rewinds ten months.

Episode 2 · The Invasions

The bedroom entered without asking, the phone confiscated, the ex-boyfriend meddled with — and the mark on the doorstep Blair refuses to explain.

Episode 3 · The Teasing and the Bar Thread

The household settles into cat-and-mouse, with the care running alongside the sisters' war — until the bar goes wrong.

Episode 4 · The Drugged Glass

The bar, the martini, and the sentence that breaks off exactly where the subtitle aired it. When the glass goes wrong, Blair moves first.

Episode 5 · The Protective Instinct

The ex-boyfriend wounded, glass on the floor, a clenched fist between him and Beatrice, then a night watch beside the girl afraid of the dark.

04

Frames from episode one

Captured from the opening episodes — not promotional art.

The kiss in the rain outside the mansion
Ep 1 · the kiss in the rain
The black sports car in the downpour
Ep 1 · the car
Blair pinning Beatrice against the car
Ep 1 · the claim
The invaded bedroom
Ep 2 · the invasion
The confiscated phone
Ep 2 · control
The iron-emblem mark on the shoulder
Ep 2 · the mark
The cat-and-mouse between the sisters
Ep 3 · the teasing
05

Our notes

Written from the opening arc. These are editorial impressions, not audience scores.

WebShorts notes · on the premise

"It is a possession mystery with the suspense running backwards — Blair knows why she is holding on from minute one and won't say. The mystery of the mark is the hook the romance keeps returning to."

WebShorts notes · on episode 4

"The turn lands on who moves first. Up to then Blair is control without context; the bar rescue is the first time her possessiveness reads as protection."

Best for viewers who like GL rich-family romance with a possessive, secretive lead and a slow trust turn; if you want the power balance gentle from the start, the opening arc is deliberately cold and invasive. Compared with most stepsister romance shorts, this one leans on an unexplained supernatural mark rather than a family secret — that mystery focus is both its strength and, for viewers who prefer grounded romance, its limit.

06

Before you press play

How many episodes does Claimed by My Stepsister run?
35 episodes, total — the official SagaBox listing is the source of record.
What is Claimed by My Stepsister really about?
Beatrice moves into the Whitmore estate carrying an iron-emblem mark on her shoulder; icy heiress Blair recognizes it and refuses to explain, turning possession into protection.
Is it based on a novel?
No official source material is listed; it is an original short drama.
Is it a GL romance?
Yes — a live-action GL romance set in a rich-family mansion, between two stepsisters by marriage.
Is there a happy ending?
The arc centers on possessiveness turning into protection; watch to the finale for how the arrangement resolves.
How do I watch Claimed by My Stepsister online?
It streams on SagaBox. We only link to the official player for it.