Living in Confinement with a Comforting Guy

"I still don't believe it...... Kazuma, who's always been so nice to me, is now keeping me in confinement...!!" Ayano spends her days exhaustingly busy at work and she eventually collapses on the street. She is then saved by Kazuma, a comforting flower shop employee who Ayano considers to be the only good thing going on in her life. As he nurses her back to health, Ayano learns they both feel the same way about each other... And she then shares a passionate night of sex with the gentle Kazuma. After they finish, Ayano leaves a note and plans to be on her way, but the moment she tries to open the front door... Kazuma says to her "I won't let you go. You're mine now." ......!?