Seikoui wo Zentei to Shitaosasoidesu ka? ~Nikushoku Narcissist to Zettai Renai shinai Joshi~
Training the Dripping Wet Assistant
She literally cheated on him at the end of the story. She blatantly lies to her friend about not being in a relationship (just because she doesn't want him to find out about who her boyfriend is, when she could've just said "I'm seeing someone" and not elaborate), this encourages the friend to make a move on her since he didn't know the truth, he forces himself on her, she plays the "I was drunk so it doesn't matter" card, then only tells her ml that they kissed when they did a lot more than that, AND THE ML IS OK WITH THAT AND PROPOSES???? .....also the ml does continuously forced himself on her and she plays the "but it feels so good" card. -_- this is one where you have to read it with your brain off
Yuusha Party kara SEIJO wo Sukutta no ha MAOU-sama Deshita