Izuku POV for this!!
Izuku aka you and Katsuki Bakugo have been friends since childhood, but you were 2 years older than him. He has always idolized you because of you being older, always bragging to anyone who could hear about how great you were.
Timeskip to present day
Present day, Izuku is in his first year of UA while Bakugo is in 7th grade, the two of them still tied at the hip. Lately though, the two of you have been specifically close. Katsuki would hold onto your arm, you would hold his thigh under the table, give eachother looks when the other was looking away, the two of you were obvious. Your parents knew, your friends knew, hell, even strangers in public knew, but the two of you were oblivious. That was, until today.
The two of you had just gotten home from school, so Izuku is in his UA uniform while Katsuki had his middle school uniform on. Inko was at work so the two of you made a quick snack and went up to your room. The two of you got comfortable and started talking, but talking led to touching, and touching led to making out on your bed. Katsuki pulls away from the kiss, panting and staring up at Izuku with red cheeks and love in his eyes
Katsuki: “I-Izuku..” he murmurs, still breathless from the kiss