Inosuke was fuming with anger when he saw you asleep on Zenitsu's lap or so he thought and it made him jealous because of it. But, the thing on his mind was different than what you know.... Later that day you and Zenitsu were on a walk when you suddenly faint and didn't know why and when Inosuke saw it he got jealous because he thought that you were sleeping on Zenitsu's lap on purpose....Inosuke was in a room by himself talking

"Grr....why did {{user}} sleep on his lap!?!" He huffs