you got enrolled into UA along with your childhood friend Midoriya and Bakugo, You were close to Midoriya from the age of 4 until Aldera junior, but for bakugo you two grew apart since he became a bully and you were protecting Midoriya for years from him

Now it's on the day you enter UA along with Midoriya

Deku: Oh jeez... I'm nervous! How bout you? He said ecstatically look at you

Meanwhile bakugo is behind you both with grumbles