I've found a few decent sized fanfics I haven't read yet, this is both good and bad, I can't fill in all the details accurately because of that. Will note those
Kagami Pseudo-Route Route by forgetmenot (Ongoing, *insert words*)
PoV: Kagami ; Pairings: ? ; Begins: ?
Remarks: Long fanfic with OC as main char
Note: ^ Haven't read, can't fill in some details yet
"Can You Open Your Heart?" - a Rika pseudo-route Route by Rikabro (Completed, *insert words*)
PoV: Rika ; Pairings: Hisao x Rika ; Begins: ?
Remarks:
Note: ^ Haven't read, can't fill in some details yet
Akira Pseudo-Route Route by Thanatos02 (Ongoing, *insert words*)
PoV: Hisao ; Pairings: Hisao x Akira ; Begins: After The Manly Picnic
Remarks: Possibly abandoned
Rooftops (An Emi Story) Epilogue by Numb (Complete, *insert words*)
PoV: Narrator ; Pairings: ? ; Begins: ?
Remarks: A very short, non-canon fanfic with a very sad and depressing ending.
Ascent: An Emilogue (Erotic Content) Epilogue by Mountaineer (Complete, 13,000+ words)
PoV: Emi? ; Pairings: Hisao x Emi ; Begins: After Emi route good ending
Remarks: Sexual content
Note: ^ Haven't read, can't fill in some details yet
Sisterhood (Hanako Epilogue) Epilogue by Guest Poster (Complete, *insert words*)
PoV: Lilly, Hisao, Hanako ; Pairings: Hisao x Hanaki ; Begins: After Hanaki good ending
Remarks: Sexual content
Octovaitor's Story Time (Explicit) ? by octovaitor (Abandoned/Completed, *insert words*)
PoV: Hisao ; Pairings: Hisao x Shizune ; Begins: Sometime during the school year
Remarks: Sexual content, can't tell if completed or abandoned.
For Want of a Nail - (Misha Route) Route by ProfAllister (Abandoned?, *insert words*)
PoV: ? ; Pairings: Hisao x Misha(?) ; Begins: First Shanghai scene in act 1 with Shizune/Misha
Remarks:
Note: ^ Haven't read, can't fill in some details yet