yes! [spoiler]
well i forgot if ilay was in it but if i remember correctly although not accurately if it was in the raga novel or another novel but taeui visited gable and xinlu's house but xinlu was not there yet then when xinlu arrived he had a bittersweet realization about his past with taeui but he was really down bad and in love with gable that time already so nothing much happened
Yuppp, in the RAGA side story, when XinYuri have been together for 7 years, Kyle gets invited to Xinlu’s dad’s birthday and brings Taeui with him... and Yuri invites them both over to their house Ilay can’t come because he has business in Russia. And the funniest part is that Xinlu gets jealous and doesn’t like his own former crush, Taeui, trying to talk to Yuri and get close to him after not seeing each other for so long, because he’s afraid Taeui might fall for Yuri

Novel reader do taeui and illay have a interaction again with them in the novel except the starting