There is a Japanese wiki for Touka Gettan which collates information about the show, including a run-through of each episode, as well as details about the characters, links to other sites, etc. I thought I'd translate the wiki for episode 3. It may not be as useful as I thought -- and it is definitely more work than I expected -- so I may not do others. But here it is.
Up to episode 3, this show just gets better and better. Unique and fascinating. Episode 4 aired a few hours ago.
→inference, question, etc.
――two days before the concert ――
SCENE1 night Yumiko’s room
Yumiko is sleeping. Nene arranges her covers.
SCENE2 night Kamiazuma house
Touka sitting in his room.
"The memories in the sword really looked and felt like my own experiences."
→Is he denying that he is Isamihiko?
Touka with the Sword, and a strange expression on his face.
SCENE2 continued Night Kamiazuma house, under the eaves facing a pond
”What should I do?”
The three sisters fly around Touka as butterflies, teasing him.
Memory 2 （fragments, apparently in reverse time order）
６．Girl with twin ponytails in a field
→because of the sound when the scene changes, this probably follows all the other memory scenes
５．White sleeve with an unpainted girl doll on the red sword
→birth of the present Touka？
→did the girl with the ponytails put it there？
４．Girl with twin ponytails in front of a burning building. In her hand is the blossoming sword.
３．Girl with twin ponytails and sword pushes Haruhiko down (?)
２．Twintail girl goes close to Haruhiko and says: “If I get the sword, Haruhiko, I’m going to cut you first.”
１．Twintail girl with Yumiko:
”I want the sword. Where is it?”
SCENE 3 night Yumiko’s room
Yumiko, sitting up quickly: “Touka-chan was different in my dream. He was a little girl. Little…
→ different in age? In gender?
”It’s okay, Yumiko-sama.”
→Are Yumiko and Yuriko combined? (Up to now, Nene has called her Yumiko.)
→is Juna possessing her, or gone?
→does the real Yumiko realize Touka is a boy?
Memory 3（also in reverse order？）
７．Kikyou at a ceremony to purify the sword (older than in 6？）
６．Kikyou at the ceremony to purify the sword (same place as 5?)
→ is she the sword’s keeper？
５．Beginning of the sword purification
→ for sealing up the sword？
４．Juna shoots out some kind of blue energy. Sei (Momoka) protects with pink energy.
Juna is defeated and Fuu cries out “Onee-sama!”
→is Juna also strangely bewitched with the sword？
→does she hate Sei for bewitching her brother？
３．Juna before the sword. She looks strange.
２．Isamihiko kills a lot of people with the sword
→although the torches are the same as 1, the dead are not soldiers. A different scene?
Fuu, Sei, and Juna are afraid. The sword is glittering. Fuu and Sei call out “Isamihiko-sama!” and Juna “Elder brother!”
１．Isamihiko offers the sword to a masked man in a military encampment. Sei is next to the masked man. Juna and Fuu have secret expressions. The masked man pulls Sei closer to him. Isamihiko grabs the sword and brandishes it, scaring the soldiers around him
the sword gives off light that cracks the mask
SCENE4 night Touka
“Please save Isamihiko!”
”What a joke. That’s just too much.”
→he is indeed denying that he is Isamihiko
Touka crawls into Makoto’s bed
→a mistake because he is so tired？
SCENE5 night 10pm Momoka’s room・Makoto’s room
Momoka puts a dictionary on her cup-ramen.
called by Makjoto’s cries, Momoka beats up Touka
SCENE6 night 10pm Haruhiko’s room
Haruhiko sitting on his bed.
SCENE7 night Yumiko’s room
Touka and Yumiko playing around together
――day before the song festival――
SCENE8 morning entrance to Kamiazuma house？
Conversation about invisible stars between Touka in ordinary clothes and Haruhiko in school uniform
Makoto on her way to school
Momoka and Makoto eating lunch
Momoka: “What if we were to part?”
Makoto: “No, no, no.”
SCENE10 evening Kamiazuma house
Touka alone in his room
→Touka didn’t go to school that day?
Yuurika imprisoned by a spirit barrier
The Ninoimiya sisters enjoying tea
”This year’s song festival will be different.”
”But we will be the same.”
→their disappearance was not their idea?
“Please save Isamihiko.”
“Does that mean it’s time?”
Kikyou appears before Touka
“Man’s consciousness, the power of the spirit, man’s powers of concentration – how many huydreds of years can they be maintained? Do you know?”
”To maintain it for so long, how much will the human heart weaken? Do you know?”
→What about Kikyou herself？
SCENE12 evening roof
Kikyou appears before Makoto
”Tomorrow’s song festival is supposed to be the last.”
”You should release the full power of the dragon within you. I will support you.”
++she did, standing there flaming along with Makoto in the hall in ep1
SCENE13 evening path home
Momoka is in distress.
Sei’s image and Momoka’s.
“It cannot go on
As Makoto practices, the dragon glows, and Yuurika’s barrier opens.
Yuurika realizes the barrier is down and escapes
Ninomiya sisters looking at cherry trees
Shouko drives a green sports car (license plate MAKO).
When she takes her glasses off, her attitude changes:
”About the 20% reduction in the student council estimates for the coming year…”
→Shouko is on the student council？
Yuurika passes by
”What?” “My goodness!”
”Isn’t that the beautiful monster you captured?”
→it was the Ninomiya sisters who imprisoned Yuurika
Touka is still sitting there
He remembers his conversation with Kikyou
“I will soon take a long sleep. I want to sleep.”
Yumiko’s room Nene peeling garlic
→for protection against Juna？
She calls Yumiko Yumiko
→because Juna isn’t there?
Fuu (green) and Juna (blue) radiating light.
Fuu is in front of a torii (not the dance pavilion)
SCENE19 night bath
Makoto thinks of Momoka
”I’m sorry, Momo-sempai. But it is what you want. ”
→How does she know what Momoka wants? Did Kikyou tell her?
SCENE20 night outdoor passageway
Touka and Momoka pass. Yuurika is watching.
“If I pretend I’m just kidding, can I hug you?”
→what is the barrier between them?
”I couldn’t come to Kinomiya, but if we meet again, I’m going to kiss you.”
→last scene of ep1
Yuurika shows herself
”What are you doing here?”
”It’s because I hate you.”
→does this have anything do do with Yuurika’s imprisonment？
Yuurika attacks Momoka, who responds with a blast of energy
→the same energy with which Sei responded to Juna’s attack？
The butterfly sisters (Ninomiya) appear
”I’ll get Nene to make me some ramen.”
→the garlic ramen from episode 2