MesmeroWatch list, 0 saved

TV series
Poster for The Reason My Boyfriend Married My Older Sister

The Reason My Boyfriend Married My Older Sister

2025 · 1 season

A slow, brooding spiral of suspicion and hurt, where every warm memory curdles into a clue and quiet domestic scenes feel quietly dangerous.

Created by
Hirokazu Fujisawa
Genres
Drama
Starring
Shiori Akita, Takuya Kageyama, Riho Takada
Overview
After a suspicious fall leaves her in a coma, Aiko wakes to a nightmare: her boyfriend is now married to her sister, and her promising career is gone. Trapped in a web of betrayal and secrets, she sets out to uncover the truth in this twisted tale of love, loss, and revenge.

Your rating is saved. See your suggestions, or find titles like this one below.

Rate it, and Mesmero finds titles that feel like it. You do not need an account.

Search YouTube for a trailer

In the UKNo streaming, rental or purchase options known.
Created by
Hirokazu Fujisawa
Genres
Drama
Starring
Shiori Akita, Takuya Kageyama, Riho Takada
In your watch list

How it feels

Written by AI. It can be wrong.

Tone
  • darkstrength 2 of 3
  • tensestrength 2 of 3
  • melancholicstrength 2 of 3
  • cynicalstrength 1 of 3
Pacing
slow-burn, 1 of 4, from slow-burn to relentless
Attention
engaged, 3 of 4, from background-friendly to demanding
Themes
  • revenge
  • betrayal
  • family
  • deception
  • identity
Places
  • big city
  • home
  • hospital
Era
contemporary
Audience
adult
Form
  • serialised
  • twist ending
Content intensity
  • Gore none
  • Language mild
  • Violence mild
  • Sex mild
All scales, 0 to 10
Scales, 0 to 10
ScaleValue0 to 10
Action2
Horror2
Humour1
Realism7
Romance4
Tension7
Darkness7
Complexity6
Emotional weight7

More like this

Titles like The Reason My Boyfriend Married My Older Sister

TV series

The Girlfriend

2025

A slow-burning psychological duel where polite smiles hide suspicion, keeping you guessing whose version of events to trust.

Dark, tense · about family and deception

Via
  • dark
  • tense
  • family
  • deception
Pacing
measured
Attention
engaged
Seasons
1
Details
The GirlfriendHidden from your suggestions.
TV series

Hell for You

2025

A taut, slow-burning revenge thriller that keeps you leaning in, with quiet menace beneath domestic surfaces.

Dark, tense, slow-burn · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
slow-burn
Attention
engaged
Seasons
1
Details
Hell for YouHidden from your suggestions.
TV series

Arafta (Bound By Fate)

2025

A slow-burning, emotionally charged drama where revenge and forbidden love collide, keeping you tense and invested in every confrontation.

Dark, tense, slow-burn · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
slow-burn
Attention
engaged
Seasons
2
Details
Arafta (Bound By Fate)Hidden from your suggestions.
TV series

Black Rabbit

2025

A tense, slow-burning crime drama about family loyalty and debt, with a dark, cynical edge and emotional weight.

Dark, tense · about betrayal and family

Via
  • dark
  • tense
  • betrayal
  • family
Pacing
measured
Attention
engaged
Seasons
1
Details
Black RabbitHidden from your suggestions.
TV series

Presumed Innocent

2024

A tense, slow-burning legal thriller that keeps you guessing while exploring guilt and betrayal.

Dark, tense, slow-burn · about betrayal and family

Via
  • dark
  • tense
  • betrayal
  • family
Pacing
slow-burn
Attention
engaged
Seasons
1
Details
Presumed InnocentHidden from your suggestions.
TV series

The Guest

2025

A polished household slowly cracks as a charming outsider turns politeness into pressure, leaving you uneasy and glued to the growing tension.

Slow-burn · about betrayal and family

Via
  • betrayal
  • family
Pacing
slow-burn
Attention
engaged
Seasons
1
Details
The GuestHidden from your suggestions.
TV series

The Better Sister

2025

A sleek, slow-tightening knot of suspicion where polished lives hide ugly secrets and every conversation feels like a trap.

Dark, tense · about betrayal and family · twist ending

Via
  • dark
  • tense
  • betrayal
  • family
  • twist ending
Pacing
measured
Attention
engaged
Seasons
1
Details
The Better SisterHidden from your suggestions.
TV series

Replica: Revenge of the Ex-Wife

2025

A slow, icy plunge into calculated vengeance, where every polite smile hides a blade and the tension never quite releases.

Dark, tense, slow-burn · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
slow-burn
Attention
engaged
Seasons
1
Details
Replica: Revenge of the Ex-WifeHidden from your suggestions.
TV series

Burn the House Down

2023

A slow-burning, tense infiltration thriller that keeps you guessing as buried family secrets surface.

Dark, tense · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
measured
Attention
engaged
Seasons
1
Details
Burn the House DownHidden from your suggestions.
TV series

Daughter of Fire

2025

A slow-burning, tense drama where a stranger's return to a small town simmers with suspicion and hidden violence.

Dark, tense, slow-burn · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
slow-burn
Attention
engaged
Seasons
1
Details
Daughter of FireHidden from your suggestions.
TV series

Sisters' Feud

2024

A tense, emotionally charged drama where family loyalty collides with betrayal and revenge, keeping you hooked on the characters' moral struggles.

Dark, tense · about revenge and betrayal

Via
  • dark
  • tense
  • revenge
  • betrayal
Pacing
measured
Attention
engaged
Seasons
1
Details
Sisters' FeudHidden from your suggestions.
TV series

Wild Rose

2025

A slow-burning revenge drama where hidden identities keep the tension coiled and every alliance feels uncertain.

Tense, melancholic · about revenge and betrayal · twist ending

Via
  • tense
  • melancholic
  • revenge
  • betrayal
  • twist ending
Pacing
measured
Attention
engaged
Seasons
1
Details
Wild RoseHidden from your suggestions.

Where to watch in the UK

No UK streaming, rental or purchase options are known.

Streaming data from JustWatch.TMDB

Details

Genres
drama
Created by
Hirokazu Fujisawa
Written by
Erika Toyama
Starring
Shiori Akita, Takuya Kageyama, Riho Takada, Masashi Ikeda, Hinako Kitano, Mariko Akama, Tomomi Maruyama
Music
Mizuki Kanno
Length
1 seasons, 8 episodes
Network
MBS
Country
Japan
Languages
Japanese

TMDB