He and I are brothers.
Kare to watashi wa kyōdai desu.
he; him; his; boyfriend
if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
I; me; private affairs; personal matter; secrecy; selfishness
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
siblings; brothers and sisters; brothers; siblings-in-law; brothers-in-law; sisters-in-law; mate; friend