蜘蛛俠 - 神勇 雙飛 - 三響炮 !!

Congratulations of losing your virginity (3p)!!  

From what you wrote, it was not a very interactive session. The other girl is just a spectator. Next time, you could ask for more, like

1) both of them bj you
2) during shower, they provide human sandwich. you are the "ham".
3) ask the girl B to lick/bm you when you are doing your job with girl A.  
4) etc. etc

Anyway, good experience and i am sure you will have your 2nd, 3rd, eetc..  3P