Sae divorced her husband and lives with her son. My son doesn't have a girlfriend, on holidays he doesn't go out, he just sleeps all day. Occasionally, I invite him to go on a hot spring trip just for the two of us to get him out. A son who always loves his mother... Sae was confused by his sudden confession of love, but she yielded to her son's enthusiasm and opened the forbidden door with the promise 'If just once...'. It was just a promise for one time, but in the end, the surge of pleasure awakened Sae's feminine instincts...
