[itsuki will be able to feel that buzen's heart rate is still gently accelerated - he was very literal about having his heart pounding. the music also helped that sense of reverberation and rhythm.
and hearing his own lyrics echoed back to him makes him laugh, because he still doesn't realize he's being flirted with, help me. he takes a second to try to remember the next part because it's kara's but -
with a hum, lowering the pitch of his voice just slightly to match kara's register, and leaning in more toward itsuki]
If I sneak in suspiciously, deeply, no one else is allowed to touch you?
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and hearing his own lyrics echoed back to him makes him laugh, because he still doesn't realize he's being flirted with, help me. he takes a second to try to remember the next part because it's kara's but -
with a hum, lowering the pitch of his voice just slightly to match kara's register, and leaning in more toward itsuki]
If I sneak in suspiciously, deeply, no one else is allowed to touch you?
[doN'T JUST FINISH THE LYRIC]