@Levi's secret waifu nay, he definitely had crush on him, like how he alwaysss blushes when he's around him or when he touches him(even that hyung realised it and was always waiting for him to confess, & since he found out he is an omega, he became more eager).. if not he(mc) would've atleast hesitated or rejected his offer to kiss him..
Pfp: My Guildmate Next Door