Edit | Respond

Deleting the "this isnt confirmed?" comments on sight from here. It's such a non-question that appears every week (if it's tagged artist unknown it should be quite self explanatory). In the very rare cases it's disowned it'll be an artist hard to miss, and if it's known NC work you'd likely see that on the sidebar. Just use deductive reasoning instead of taking up space for nothing.
start - 0:34 takahashi
0:35 - end hibiki
can see heavy shouma yamazaki corrections here also