Comment by kawaii on FIND or REQUEST NEW MANGA

hello, can someone help me find this manga, I'm not sure if it's an anime or a manga, but I don't think there's an anime like this, I don't remember much, but it's about a girl and a boy, I think they were childhood friends, and I only remember some scenes, the first scene where a girl went to school for the two of them with a black limousine, she looked like a child but was older than them I think she has white hair, I'm not sure but I think that the girl wanted to find out why the boy moved away when they were little but I'm not sure, the older girl somehow helped her look into his past, I don't know how, I remember that the girl woke up in bed with the boy and they were both in their underwear, they both thought it was just their illusion of them self, like the boy thought that the girl was just his imagination and the girl thought the same but they were both there together, then her Mom came into the room, the boy hid under the blanket and his head was in her 🐱and he was blushing, then I don't remember what happened but then he was somehow lost and wandered there in his child's body and his memories ran through there, the girl saw what he was doing and how he was feeling. his memories were vividly there she watched him and they accidentally met she was in her normal form but he was there as a child, they sat on the bench and he was sad and said something to her she calmed him down and hugged him then in his normal form he remembered that someone helped him in the past, but I don't know if he knew that it was her, his mom even appeared there and said something to her, and I remember that the older girl kept asking her if she was doing something with him,something sexual, she was very interested in the topic, I think it was some pills that she was testing on them and she wanted to know if it will work with making love, I think I'm not sure. Please let me know if someone knows the name I'm 😭desperate!!