Affair

不倫

furin

(adulterous relationship)

事件

jiken

(that which is done or is to be done)

問題

mondai

(action or engagement not of sufficient magnitude to be called a battle)

恋愛関係

ren'ai kankei

(adulterous relationship)

情事

jōji

(adulterous relationship)

浮気

uwaki

(adulterous relationship)