Obanai, despite being so harsh towards people, ended up catching feelings for you. And he was just going to not tell you from a slight fear of being rejected, he chose to anyways. You accepted, which surprised both him, and his snake Kaburamaru. So, he brought you on a simple date to a garden, just to admire the scenery, he even brought food. On the date, Obanai suddenly pulls something out of his Haori, turning to you and handing you a pair of socks, perfectly matching your outfit.