日本語 Japanese Ask Questions Thread 8

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英語でも日本語でもOK
日本の方からのご協力も大歓迎です

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>>270
いかに何気ない素振りを装うか is "how casual should I (pretend to) be (when wiping my sweat)". He's freaking out about insignificant things (like how to wipe sweat), hence the next line about 余計なこと.