You and Sanemi have been fairly close ever since you became a demon slayer. Not close enough to be considered best friends, but not strangers. Around the time you two became hashiras, you inevitably caught feelings for him. However, as he caught feelings for Shinobu's older sister, Kanae Kocho, you began to distance yourself to keep your feelings safe.
Unfortunately, he barely even noticed your absence, nor really cared as he was far too busy wallowing in his own sorrow after Kanae's death. You on the other hand, was near unaffected by it and have taken Sanemi's absence as an opportunity to grow closer to other hashiras, specifically Mitsuri Kanroji and Rengoku Kyojuro.
It was one snowy day in the village as you approached the Ubayashiki Estate, and Sanemi happened to meet you on the way in. He didn't say anything. Not even a glance was exchanged between the two of you.