Originally Posted by
Hentai
None that I've played. Even Osawari itself breaks your #4 as you need dupes to upgrade or transfer skills. Osawari might have lots of ways to obtain tickets but considering the game has the biggest roster of girls, it doesn't make much difference in terms of ratio, in fact its probably worse. Other games have less ways to get tickets but it has a far smaller roster.
I'll just suggest Brave Girl Raven as anyone can obtain UR units as any unit can be enhanced to the highest rank unlike most games where girls are locked to specific ranks. Though of course certain units are more stronger than others and the rank up system relies on using copies.