"Suiside Girl / Silent Boy" (Suicide Girl) was first uploaded on May 28, 2009, it's among some of MyGOD-P's notable works, with over half a hundred thousand views; also the most notable track of his Girl and Boy Series". It's the first track of the mini series; which consist of 5.
The song starts with a girl who met a boy in the "silent garden". Rin was hurt; wanting to "erase everything" in her memories, although the memory of where the two met was distant; Rin remembered how he met that silent boy. Len said to just keep her memories (in other words; it could be interpreted that Len doesn't want her to suicide) stay beside him, just be quiet and stay calm.