Amazing game! Each character gives a different feeling and it's very refreshing going through diferents routes. The concept itself is very interesting and the actions scenes were very well writen, represented their trained skills in taking the enemy in fast and efficient ways than if they were exausting battling like in a shounen anime. My favorite route was Haruto mainly beacuse It seemed Ren had more interactions with all the characters, just my impression though. I like the soundtrack, my only problem is they way the music cuts to switch to another in some scenes specially when in does it multiple times because I couldn't help getting distracted by it.
Also I would like to inform that in 2 times in Haruto route, when one of the characters left the room, their sprites didn't go away, not sure if It was intended.
Overall I really liked the playtrhough, it was nice how the interactions were diferent and he shared diferent memories with each one, it sure helps keep interest in getting through every line the game has to offer, and the option to make amends with his brother was a nice touch. The art was also very pretty and the CG's were well done. I'm excited for future games.