Why My Boyfriend Became My Sister's Husband / Serina Misō

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

"My love and my work were going well on my 25th birthday. Until that incident happened," Aiko Miyata (Aiko) lost her parents when she was a child, but she was surrounded by her gentle sister Saeko and her excellent and good-natured boyfriend Yuma and had a pleasant life. Yuma invited her to tell me something important, and she was excited about the premonition of marriage proposal. On the day of her birthday, Ayashi was stabbed by someone? And from the moment she woke up, Ayashi was involved in an unimaginable tragedy! Love-hate suspense that makes you feel too painful but addictive!