Period
Summary
“Dear God, I now make this, the single request of my life…”
The near future, Nagasaki.
Into this city, with its long and checkered past
was born a rarity: a child with wings.
I don’t know when it started, but
the school overlooking the town
came to be known as hallowed ground
and that is where we met.
Though summer comes closer, there is nothing new, and a boring day just rolls on. But his boring life suddenly ends. He is forced to look for a key of the observatory. He reluctantly accepts it, but gets a little bit excited. An exciting feeling.... A hunch that something will happen. Just before the summer holiday, he meets her...
Ending Guideline / Suggested Route Order
Period is based on a point system that awards points to each character depending on the choice you chose. For simplicity's sake I compiled all of the point choices into basic choices for each character. With the exception of one choice no points are taken for different choices but the choices will affect what summer you have and what heroine you get at the end. The choices below are only the ones that give points, anything I left out will have no impact on your route. Also note that some choices below may not appear depending on some choices beforehand. ★ means the choice doesn't matter in that specific route.
There is no route order required to understand the story, but to get all the routes you have to play two characters at a specific point. Asahi will need at least two other girls AND Miyu's route completed for her route to appear. Koto's route will only appear after you complete ALL of the other routes. if you do wish for an order I suggest:
Miyu/Yukina/Rin/Aoi/Kohane/Tsuzumi/Asahi/Koto
Route Guideline
Yazuki Miyu
Good End
Kawasaki Yukina
Good End
Kagamiya Rin
Good End
Sawatari Aoi
Good End
Koishikawa Kohane
Good End
Mizuhara Tsuzumi
Good End
"True" Route
*Note that this requires at least two routes AND Miyu's to be completed*
Onodera Asahi
Good End
Bonus Route
*Note that this requires ALL routes to be completed*
Sawatari Koto
Good End
Attribution
This walkthrough is based on info attained on gamefaqs.com and tlwiki.org with some adjustments made by me.