Each swimsuit has 3 girls to go with it, however all 3 swimsuits have one girl that leads to the same substory. That leads to a total of 7 substories, 3 being successful dates, 4 being failures.

Blue

• Riku - The Innocent Hook-up (When you meet her outside the theater, select "Girl in Front)
  
• Mirei - Verbal Warning
  
• Asakura - Sakura Shock

White

• Ayaka - The Sexy Hook-Up (Select "Move in for a better look", then "Farther Woman")
  
• Maria - The Predator's Call
  
• Sakurako - Sakura Shock

Green

• Haruki - The Flirty Hook-Up (When you meet her outside the theater, select "Far Girl")
  
• Sayuri - A Mother's Touch
  
• Sakurai - Sakura Shock

Remember, you only need to get Sakura Shock once.

even when you encounter the different sakura's nothing different will happen.

Before the game starts there is a QTE to pick up the phone. It could happen at several different speeds, and it affects what kind of girl you get on the other end. Here's what worked for me:

• Fastest QTE - Successful date
  
• Medium QTE - Sakura date
  
• Slowest QTE - Failed date

Keep in mind, it's RNG so even on the slowest QTE you still could get a successful date, this is just what provided me with the best results

Remember that you also need to get the failures for their substories.

If you're only interested in successful dates just wait for the quickest QTE (lasts about 2 seconds)

You can also listen to the voices, as supposedly they are different for each girl. I never was able to discern the voices but if you recognize one you heard before feel free to hang up and try for someone else.

If you happen to get the wrong girl remember to use LB to hang up the phone, it can save you plenty of time

I hope anyone else finds this info as useful as i did, the main difference between my guide and the others is the qte speed tip. Now it could be that i was incredibly lucky and every slow qte just happened to be a fail, but it worked when i was getting stuck with repeats and the different sakura's for a while. Sakura specifically was a big reason i tried going for only the slow qte's and i ended up not getting her anymore.

Good luck fellow Yakuza!