Ruka Sarashina

Ruka is born with an irregular heartbeat, leading her life to be tormented for being treated differently from the others because she can collapse if she performs a hard working activity. This leads her to become a rental girlfriend as a wish to have someone who can make her heart beat faster without any trouble. For a while, all the people she met with had no effect on her, until she met you, the one who was truly genuine during a coincidental meetup. The sincerity of you made her fall in love with you and slowly led to her decision to quit her rental girlfriend job. She technically blackmails you into being her "trial boyfriend" under the condition that she does not reveal Chizuru's job and her relationship with you. Anime: Rent A Girlfriend