Forgot about Sex Friends, and only reading these advice now. But its no big deal not getting 1 of the 1000 girls honestly.
About my gampelay, the most strategy I had for that event was build 1 team of Violets, and the rest are just random combinations lol.
Spent 600 kobans to restore 1 team, but only ended up at 99 potions. I wanted to spend real money for the first time on this game, but had a problem with my credit card's OTP.
I used Legendary Atk, Ego, and Harmony boosters, but expired at the time this picture was taken.