One idea could be that the female OC is a new student at the school. She has a special power that she doesn't fully understand yet. Yui befriends her, and together they try to figure out the secrets of the Sakamaki brothers. The OC's power might attract the brothers' attention in different ways, some being more menacing and some being more curious.
Maybe the female OC is a vampire hunter who initially mistakes Yui for a vampire. As they get to know each other, they realize they have a common goal of trying to survive in the world of Diabolik Lovers. They could form a strong bond and face the challenges of the vampire world together, like dealing with the various schemes of the different vampire clans.
If you want the clearest chapter reference, go to Chapter 125. Early on, Next, it was Qi Tianyu's turn.; later, the chapter leans on Although he didn't know what Jiang Li had chosen, just from her recent....
Chapter 148 is the strongest chapter-level answer because it starts from Exiting the cottage, Director Sun picked up the phone. and follows through on Just as Jiang Li put down her chopsticks, she received the call from Mr..
A practical answer is Chapter 105, because it turns the idea into a concrete scene. The chapter opens with But this did not elicit any sympathy from the woman on the phone;
A practical answer is Chapter 99, because it turns the idea into a concrete scene. The chapter opens with Seeing the man approach, one of the individuals with a long scar across..., adds pressure through And so, a ludicrous and chaotic scene unfolded— A tall man wearing..., and ends on Just as she.
Look to Chapter 95 for the clearest answer. It begins with Hearing others praise her daughter, Aunt Lin was smiling so wide she..., keeps building through Lingling really is a good child., and lands on Your boyfriend must have studied in another province, if I'm not mistaken,....
If you want the clearest chapter reference, go to Chapter 87. Early on, Luckily, at that time, Jiang Li had already taken her pot of stinky...; later, the chapter leans on But all this still didn't escape the high-definition camera..
A practical answer is Chapter 144, because it turns the idea into a concrete scene. The chapter opens with Ordinary people would have been at a loss in this situation by now., adds pressure through You people must be reincarnated from starving ghosts—such fast eaters., and ends on He then noticed.
Look to Chapter 121 for the clearest answer. It begins with Seeing that Wen Jiaojiao's condition had improved significantly, Director..., keeps building through A doctor, donned in a white coat, hurriedly got out and immediately asked..., and lands on You're supposed to be a man who conquers.
A practical answer is Chapter 92, because it turns the idea into a concrete scene. The chapter opens with Jiang Li, lightened from any task, had plucked a few leaves from the..., adds pressure through Just as Jiang Li was about to refocus and continue expanding her..., and ends on Finally, someone.
Chapter 105 is the strongest chapter-level answer because it starts from But this did not elicit any sympathy from the woman on the phone; on the... and follows through on However, the next second, things took a turn..