notadictionary.com
弟「あ〜マジイラつく。ムシさんが走るわ」
→ “Younger brother: "Ah~ seriously annoying. I'm about to lose my cool."”
弟 otō¹to = younger brother (noun)
「 " = opening quotation mark (punctuation)
あ〜 aa = ah~ (interjection expressing frustration)
マジ maji = seriously / for real (slang/adverb)
イラつく iratsuku = to get irritated / annoyed (v.)
。 . = period (punctuation)
ムシさん mushi-san = bug-san / buggy (noun + honorific)
ムシ mushi = bug / insect
さん san = -san (honorific suffix)
が ga = subject marker particle
走る hashiru = to run / to dash (v.)
わ wa = sentence ending particle (female/intimate)
」 " = closing quotation mark (punctuation)
notadictionary.com
ボク「......??」
→ “Me: "......??"”
ボク boku = I / me (informal pronoun, male)
「 " = opening quotation mark (punctuation)
...... ... = ellipsis (indicating silence/pause)
?? ?? = question marks (expressing confusion)
」 " = closing quotation mark (punctuation)
