baka-nendou-saiki-kusuo-no-psi-nan.png

Translation

• Context: Saiki Kusuo 斉木楠雄 explains why he can't figure out what Nendou Riki 燃堂力 is thinking.
• riyuu wa
  sugu wakatta
  理由はすぐ分かった
  The reason [I] understood immediately.
• paaan
  ぱーーーん
  *ta da!* (sound effect used when something is presented, in this case, Nendou, the character.)
• wahihi ahii
  わひひ　あひー
  *idiotic snickering*
• kono otoko
  baka
  nano de aru
  この男バカなのである
  This man is an idiot.