If Only You Weren t the One (2026)

Other name: Honmei Janakya Yokatta no ni , ほんめいじゃなきゃよかったのに , 本命じゃなきゃよかったのに

Synopsis: :
Onuma Mihono works at a travel agency. After breaking up with her boyfriend of six years, someone she had been thinking about marriage with, she realizes she is already 30.
Then, a man transfers into Mihono’s company. It is Ureshino Eisei, the “accomplice” with whom, despite both of them having lovers at the time, she had a physical relationship 10 years ago. Mihono is shaken when Eisei speaks to her with a cool expression, but she resolves to treat him normally. However, when they are alone together, Eisei whispers in the same sweet voice as back then.