a peaceful time before trouble begins
問題が始まる前の平和な時間 (mondai ga hajimaru mae no heiwa na jikan)
"The classroom was silent, like the calm before the storm."
"教室は静かでした、まるで嵐の前の静けさのように。" (kyoushitsu wa shizuka deshita, marude arashi no mae no shizukesa no you ni)
to do more than what is required
to sleep very deeply and soundly
to connect or become involved in something, usually a system...
to contact someone for help or communication
in very good health
to praise oneself; to boast about one's achievements