Can I know if we can keep using the date function or after using for the first time then we need to pay for the increased fee for next time?
No, that's only when asking someone out. The first time you ask anyone out, it's free. If at any time you two break up, then the next time you ask another person out, it will cost 79ec Dating is a feature inside the big relationship. You can do as many as you want when In a relationship. The only time you will use EC for dating is when getting a full/half Regen or getting pink name for 24hrs. I alternate between the gym - Attack boost date and the study date - Attack boost date, so I'm alternating between 10m str and 10m Intel
Only thing I would improve is how you calculate the bonus....just go to their profile and multiply their stats by 5 and bam done