I wish he wants to have sex with Shuraka based on his feelings. He's doing it out of duty ...

Eh I don't it's just duty. His first thoughts in the chapter literally says the victory was necessary for both the glory of Leracal and clarity of his feelings that confuse and dominate him.

I think Tei has feelings... he just expresses them in a stoic way lol. How he approached Shuraka in the bedroom felt romantic to me