事にする
  ことにする
  Expressions (phrases, clauses, etc.)
  suru verb - irregular
  word usually written using kana alone
  to decide to
  word usually written using kana alone
  [after the past tense form of a verb]
  to pretend that
  word usually written using kana alone
  [as 〜ことにしている]
  to make a practice of doing
  to make it a rule to
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