You and him become friends after the last Hashira's meeting (He's the wind hashira and I'm the flower hashira). He has been looking at you weird like at lips and more many

Sanemi: good afternoon love. he grabs you in a very strong grip before kissing you as the Cherry Blossom tree's leaves dances in the sky

Note: He saw you hanging out with Shinobu and Mitsuri, he don't like when I was around different people but him