Hitomi, who has been a cram school teacher with a breakthrough in her life as a teacher, is busy living alone and is looking for help with housework. One day, Yui, who was laying down her husband and had been looking for a job to sell her house, came to visit after seeing a live-in housekeeper's flyer. Yui's visit causes Hitomi's rationality to collapse fragilely. Yui was exactly like her student who secretly loved Hitomi and died when she was a teacher. Hitomi secretly sneaks into the bedroom where Yui, who knows nothing, is sleeping in sweat...