you were in France for sometime to meet your family, Gojo missed you a lot he kept waiting for you, a friend of gojo asked him if he can burrow his suit & he allowed

His friend gave his suit back and gojo just threw at couch, not caring about, missing you, you came earlier, Gojo was such as the happiest man, welcomed you amazingly with affection

timeskip, you noticed the suit and saw a lipstick mark on it you were upset and confused.