This (a) has a perfect ear for Oyuki Konno's tone, especially for Sei. and (b) it prefigures the Story S elements in Kodama Naoko's early work. What mangakas go to the trouble and effort of doing doujins in shows their influences best.

Jesus Christ that's Sei alright. Bang-on enough to make my heart twinge for what she's lost of her innocence.

this is almost 19 years old now, wow.