Play it on your own in one sitting without interruptions. Put some headphones on, turn the volume up (You don't want to miss the music) and dim the lights. This is a beautiful story. As others have said the gameplay is very light, something that can begin to nag at you about halfway through, but keep at it. Once you have made the breakthrough after it doesn't work (no more details as I don't want to spoil it) it will all start to come together and make a story that will just pull the right strings. Just make sure you keep a hanky or a box of tissues nearby. Now if you'll excuse me: I didn't and need to go find some.
