The Reason My Boyfriend Married My Older Sister (2025) is a drama web series in Japanese. On New MovieLinkBD: full story, cast, ratings, season & episode guide, official trailer and where to watch The Reason My Boyfriend Married My Older Sister online in HD.
The Reason My Boyfriend Married My Older Sister — Storyline
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.
Cast & Crew
- Starring: Shiori Akita, Takuya Kageyama, Riho Takada, Masashi Ikeda, Hinako Kitano, Mariko Akama, Tomomi Maruyama
The Reason My Boyfriend Married My Older Sister — Series Details
| First Air Date | 2025-08-07 |
| Seasons | 1 |
| Episodes | 8 |
| Genre | Drama |
| Language | Japanese |
| Network | MBS |
| Status | Ended |
| Rating | 6/10 (2 votes) |
The Reason My Boyfriend Married My Older Sister — Episode Guide
Season 1
- E1: Episode 1 (2025-08-07) — Everything was going well in both her love life and her career. That was until that day came. Miyata Aiko (Akita Shiori), who works at an apparel store, lost both her parents at a
- E2: Episode 2 (2025-08-14) — Aiko (Akita Shiori) is called to a hotel room by her ex-boyfriend, Yuma (Kageyama Takuya), who is now her sister Saeko's (Takada Riho) husband. For some reason, she meets Yuma's fa
- E3: Episode 3 (2025-08-21) — It's been a month since Yuma (Kageyama Takuya) and Saeko (Takada Riho) suddenly disappeared. Now alone, Aiko (Akita Shiori) has been transferred to a new department. Meanwhile, a n
- E4: Episode 4 (2025-08-28) — Aiko (Akita Shiori) has started dating Takatoshi (Ikeda Masashi). She tries to forget about Yuma (Kageyama Takuya) and focus on Takatoshi. But one day, when Aiko gets out of the ba
- E5: Episode 5 (2025-09-04) — Aiko (Akita Shiori) , who witnessed the shocking state of her sister Saeko (Takada Riho) , is shocked to learn from Yuma (Kageyama Takuya) that Saeko and Takatoshi (Ikeda Masashi)
- E6: Episode 6 (2025-09-11) — While Yuma (Kageyama Takuya) is being held captive by Saeko (Takada Riho), Aiko (Akita Shiori) is visited by Yuma's mother, Yuriko (Akama Mariko). Yuriko learns that Aiko was not h
- E7: Episode 7 (2025-09-18) — Aiko (Akita Shiori), who was held captive under Saeko's (Takada Riho) control, had her sense of self-worth denied, her dignity as a human being taken away, and she lived a dark lif
- E8: Episode 8 (2025-09-25) — Saeko (Takada Riho) chokes Aiko (Akita Shiori) and says, "You lost," with a look of hatred on her face. However, Aiko still tells her that she loves her sister, even after learning
Frequently Asked Questions
How many seasons does The Reason My Boyfriend Married My Older Sister have? 1 season(s) with 8 episodes.
Where can I watch The Reason My Boyfriend Married My Older Sister? See the Where to Watch section above for current streaming options.
