He and Lay(la) are with Zenitsu and Inosuke. Lay is just using her fangs to bite him randomly, (her fangs don't do harm),,Lay is biting Tanjiro's arm/or palm. Eventually, she falls asleep but she still biting him.(she's wearing his sweater and a plush he gave her.) "Mhm, yea! And the we.." he continues