:D For
sandissoftest Lili will give you your first music sheet and you just need to practice that - when you do, the timer should go off and within that time(**) you need to run around the ground/area looking for more faries(Ferro) so you can gather more music to practice with
** if you talk to the students with a red music note the timer will be extended in that area one second, so talk to them if you want more time
When you practice your music there should be a notice at the bottom telling you where to find the Raame so you can practice and then play that song at the concert. Raame(ラーメ) are hidden and you can't see them but you should be able to hear the music playing around the area that they are hidding - just run around and you should find them. Pick one of the options at the end if the 'play'. Each answer will give you different keywords for the song.
Kanazawa(sensei) will give you a theme each time along with a set of keywords for the concerts. They are highlighted in yellow and each song has a set of keywords - I think it's best to pick the music that has the most keywords in order to win (though making sure you practice that song well is also important)
If you practice your music well enough and win in the top 3 at the concerts your rival meter will go up for some of the characters. I'm not sure what the other requirement is though - the highest I've managed to get anyone at rival mode is at 3 ^^;;
To get the heart meter up you should practice with them/do a duet practice(?) a lot. Wear the dress/accessories at the concert that the character likes. They each have a song that they like (though I don't know which ones at the top of my head ^^;;)
For Shibobu I was able to get his heart meter up to MAX just by playing/practicing with him within two game days. It was... easy? I probally don't have all his cg stills/events though. Unlike Girl's Side which have a fair ammount of CG stills, I think there's a LOT cgs/events to gather for Corda characters o_o
Also, give them presents with the BP you get when practicing in front of people. (second option - there should be a red circle that'll apear when you practice, it's the range of your music/will tell you who will listen to you practice)
You'll get BP (bravo points) by playing well in front of people and by playing with another character. You have to have a song that can be played with another character's (or student's) musical insturment or else the command won't appear. ^^;;
With enough BP you can get items/presents/accessories/Exp. up items at the statue/monuments in valarious areas in the school (ex. fountain near the train station/school entrance gate/The park area on weekends)
This is all I can think of at the moment for tips. If I come across any more information I'll make another post - or just ask me here in the comments XD; I haven't even gotten 10% of the CGs or event endings though so I'm not sure if I'll be of any help but I'll try! ^^
There's this lady at work, her name's Linda. =_= I've never been so werided out than I have with her. She's perfectly nice and everything but OH. MY. GOSH. I be nice to her and she asks "Do you like me!? Do you like me!? I like you!" so I say "Yeah, I like you...*smile*" I mean, I saw no harm in saying that and this continued on for a few days. It got a bit annoying each time she asked though.
Then later in the week. "I love you! Do you love me!?" and she comes up to me and HOLDS ME...Like WTF? Out of the blue. It's like, o_o Uuuhhhhh!? It's just WERID. I don't like being touched/hugged by anyone I don't know well, it makes me really uncomfortable. Urghh I'm just going to try and keep my distance from her but it's hard because she works in the back and the store's small. S-someone save meee~~ ;_;