TV series
The Reason My Boyfriend Married My Older Sister
2025, Japanese, on MBS.
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.
- Seasons
- 1
- Episodes
- 8
- Episode length
- 23 min
- Status
- Ended in 2025
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Where to watch The Reason My Boyfriend Married My Older Sister
The Reason My Boyfriend Married My Older Sister isn’t listed on any OTT platform in India yet.
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Latest episode
S1 E8: Episode 8
Aired 25 September 2025
Seasons 1
Cast & crew
Details
- First aired
- 7 August 2025
- Last aired
- 25 September 2025
- Network
- MBS
- Original title
- 私の彼が姉の夫になった理由
- Language
- Japanese
- Country
- Japan
- Type
- Scripted
Check ratings elsewhere
News & fan talk
What The Reason My Boyfriend Married My Older Sister is based on
The Reason My Boyfriend Married My Older Sister is adapted from a manga.
Source details from Wikidata and TMDB.
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The Reason My Boyfriend Married My Older Sister: quick answers
Is The Reason My Boyfriend Married My Older Sister worth watching?
The Reason My Boyfriend Married My Older Sister doesn’t have enough ratings for a verdict yet.
How many seasons of The Reason My Boyfriend Married My Older Sister are there?
The Reason My Boyfriend Married My Older Sister has 1 season and 8 episodes, about 23 minutes each.
Is The Reason My Boyfriend Married My Older Sister finished?
Yes. The Reason My Boyfriend Married My Older Sister ended in 2025, so you can watch the whole story.
Which OTT platform is The Reason My Boyfriend Married My Older Sister on?
The Reason My Boyfriend Married My Older Sister isn’t listed on any OTT platform in India yet. (Checked 14 November 2026.)
The Reason My Boyfriend Married My Older Sister parents guide: is it suitable for kids?
No age rating is listed for The Reason My Boyfriend Married My Older Sister yet.
What shows are like The Reason My Boyfriend Married My Older Sister?
If you liked The Reason My Boyfriend Married My Older Sister, try Burn the House Down, Fishbowl Wives, Hero.
What is The Reason My Boyfriend Married My Older Sister based on?
The Reason My Boyfriend Married My Older Sister is adapted from a manga.