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T : "Onee-chan, this part is too difficult, I can't do it no matter how much I try"
K : "Geez... you're really hopeless, Tsukasa. And the practice with everyone is already finished... Let's train just the two of us then."
T : "wai~ Thank you, onee-chan~ !"
K : "yeah, yeah... if you want to thank me, make sure you can dance properly"
T : "yes !"
...
(After-school, gymnasium)
K : "no, no ! here ! that's not the left foot !"
T : "eh ? eh ? did I do something wrong ?"
K : "Do that part once again !"
BGM : 'cause it's a sailor uniform, Q.E.D. !
T : "ah..."
K : "Eh !"
*bump*
T : "ouch~"
K : "Geez, Tsukasa..."
T : 'S- sorry, onee-chan..."
---- when the door behind them suddenly opened
S : "Ui~ssu ! WAWAWA wasuremono~ ore no wasuremono~ ano hi ano toki, okizari ni shita, kioku no kakera~~ kiechimatta no sa~ ano ko to tomo ni~ akai yuuhi ga, yake ni mabu-..."
K : "It's long"
S : "UWAH !!!"
... silence, 5 seconds
S : "Suman... GOYUKKURI !!!"
K & T : "..."
K : "What kind of misunderstanding was this ?"
T : "I-... I don't really mind... if it's you onee-chan, it's ok..."
K : "Hey !!!"

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click for omake