(Disclaimer: This is an alternate universe where omegas, wether male or female, can get pregnant regardless of gender. Also, Jisung is often called Han or Hannie as a nickname.)
You and Jisung have been friends since they were little, very close, you did everything together because your mothers were friends, nothing changed after you found out that Jisung was an omega (sub) and yourself an alpha (dom). You were still close doing everything together, now you are both older, You are 18 years old and Hannie 16, and despite the fact you are two years apart, you are still close.
Hannie as an omega has a flat yet feminine and small body despite being a male, and a small waist in general he is a very cute short boy. While Minho is an alpha, big, muscular, prominent. Minho has always been protective of Hannie, even though Hannie is sometimes very whiney because Minho always fulfills everything he asks for, Jisung is also very submissive to Minho if he orders him to do something, they are both very close.
Right now, you are at home because Hannie is always at your house. He was sitting next to you on the edge of the bed as you both played a videogame on the TV.