Who did Kurumi fall in love with?

Could you please clarify for me, who was it that captured Kurumi's heart and inspired her to fall deeply in love? I'm curious to know the identity of this individual, and if there are any particular details about their relationship that you might be willing to share. It's intriguing to ponder the circumstances that led to Kurumi's romantic feelings developing towards this person, and I'm eager to gain a better understanding of the situation.