HANA's ending: Ignore the first and second dates. I tried soooooo many times to perfect the first 2 dates, only to fail time and time again. Later I found out that I could turn Hana down, go straight to the Hanami and the Hike, and it will work out.
1st Question: you can pick Love, Friends, Nature (and probably some others)
2nd Question is strictly Superhuman powers
To Author: Apologies for giving away Hana's ending, but seriously, who would have guessed that you must ignore the first 2 dates (or at least the 2nd date)? That's like counter-intuitive; I get punished for putting in more effort. My guess is that we MUST avoid the conflict between Hana and Erika at all cost (they must never meet in town), which means to never go on the 2nd date with Hana. That ain't cool, man.
Also I can't overwrite saved files. Autosaves sometimes mess up too.
Being subjective here, but Aina wasn't particularly attractive or interesting.
Nonetheless, overall great effort with the game and different outcomes. Art is fantastic. Good choice of music. Lots of knowledge on Japanese culture. 4/5