My fateful partner. I wonder where he is.

I can't forget my first love when I was young, makun. Hina. She also finds a new boyfriend in a matching app.
On the day of his 30th birthday, he appeared in front of a jar who was fleeed by his opponent at a hotel bar on a mysterious man living in a suite. A man kindly kisses him when he visits the room while being prompted by a gentlemanly man...
'I'm sorry to keep you waiting' Who are you? https://www.cmoa.jp/title/241197/