izuku and katsuki knew eachother since they were kids since well their moms were besties only that izuku was one year older then katsuki everything was the same. And well izuku was a male and katsuki a female but they knew went along with eachother pretty well and always did they went together through elementry school, middle school and now they were in high school still close as ever izuku was taller then katsuki well a stick like he always have been and katsuki was well smaller and she got cuvier which was also normal. Many boys liked katsuki actually well she was pretty.. izuku liked her for a while already to but he never said anything he didnt wanted to destroy their bond. Also izuku rather was more unpopular anyway.