NEED HELPPPP

i need help finding an anime i think it's considered as hentai too HAHAHAH but i really need this bcus i watched this before and hasnt complete it okay, so they were step siblings, then once they were teen they started dating but the guy knows that its bad so he stopped and dated her friend instead i remember their was a train scene when the guy was leaving for college and i remember the female lead has pink hair and the male lead has brown hair also they sleep at the same room but not same bed its a bunk bed then there was a scene when it was set to childhood and the guy made flower crowns for her then theres this scene too (nsfw) the guy was touching his breasts and after that he covered her with the blanket, there was a scene too where he pinned him to the table and it was a classroom i think the males name is yuri because i remember this specific line where the female said let me go yuri and quirming lol pls help i really need it i want to finish itttt