A song, inspired by a few things.
This piano piece is based off of the traditional Title/Menu screen from the Windows based Touhou games.

This is the beginning of twenty.

[Story]
Okay, so this is the story of Old Gensokyo, and is a direct sequel to the game currently being coded.

After the Kirisame Shrine incident in Eternal Twilight, Gensokyo has been mostly quiet. However as usual, the peace doesn't last forever. Aya, the jorunalist has been bothering Marisa - Player character B- about the earlier incident, and like Mokou - Non playable character, who was player B in Eternal Twilight - won't say anything. Finally fed up with it all she travels off on her own to old Gensokyo. She never returns. Time passes and the Tengu send out a search party for Aya, but they too begin to disappear. The problem continues to grow and soon it becomes impossible for the residents to ignore the problem any longer.

Characters:

Reimu, Shrine Maiden. It's her job to deal with incidents.
Marisa, Ordinary Black Magician. Curious more than anything.
Nageki, Perceptive Shinigami of the Old Shrine. Seeking to find why all of those whom he knows are vanishing.

Reimu A: Homing Seal [Perfect Cherry Style Reimu]
Reimu B: Youkai Buster [Perfect Cherry Style Reimu]
Being that it is her job to deal with incidents, Reimu sets off on her quest to deal with it.

Marisa A: Twilight Magic [Marisa D, Eternal Twilight]
Marisa B: Arcane Magic [Perfect Cherry Style Marisa B, when unfocused acts like Perfect Cherry Style Marisa A]
Considering Marisa's new responsibilities, and to a degree governance over old gensokyo, she has to do it. But, really it's more due to curiosity.

Nageki A: Shikigami Type [A difficult to use character who fights with his own shots as well as managing a shikigami that locks into place when focused. Thing Character type C from Mountain of faith.]
Nageki B: Shinigami Type [Plays a bit like Sakuya B from Cherry Blossom, but when focused, shot type acts like Reimu B, firing off shots that do a lot of damage but have a large delay between them.]
He lives there, and many of his friends are disappearing, he sets off to find out why.

People all over old gensokyo and new gensokyo are disappearing. Where are they going?

[Tracklist]

Track 01 - Whispering Memories ~ The Old World (Menu/Title)
Track 02 - Fragments of a Past Forgotton ~ Fading Dream (Stage One)
Track 03 - Incidental Disappearances (Boss One)
Track 04 - The Forest Village ~ The Land the World Lost (Stage Two)
Track 05 - The Maiden Who Watches (Boss Two)
Track 06 - Crisis in the Forest (Stage Three)
Track 07 - The Scent of Death (Boss Three)
Track 08 - Tunnel that Leads to Nothing ~ Shadows Underfoot (Stage Four)
Track 09 - Light and Shadow ~ Fragrant Image of the Past (Boss Four)
Track 10 - Netherworld Shrine ~ Negative Space (Stage Five)
Track 11 - Mimic (Phase One - Boss Five)
Track 12 - Mimic (Phase Two - Boss Five)
Track 13 - Mimic (Phase Three - Boss Five)
Track 14 - In the Shadow of the Black Tower (Stage Six)
Track 15 - Uprooting the World ~ Devourer of Histories (Boss Six)
Track 16 - Crisis ~ Tower of Histories (Stage Extra)
Track 17 - Pandora (Boss Extra)
Track 18 - Return of the Old World (Good End)
Track 19 - Fragrant Memories of Another Life (Bad End)
Track 20 - White Night's Illusion ~ Black Morning's Reality (Credits)