1. koibito, chijin   boyfriend   colleague   lover   acquaintance   Hint Half-n-half Clue   2. shinrui   lover   boyfriend   relative   roommate   Half-n-half Clue   3. douryou   workmate   boyfriend   girlfriend   lover   Half-n-half Clue   4. shiriai, chijin   acquaintance   fiancé   playmate   fianceé   Half-n-half Clue   5. chimumeeto   neighbor   fianceé   teammate   relative   Half-n-half Clue   6. konyakusha   fiancé   folks   friend   fianceé   Half-n-half Clue   7. koibito   acquaintance   lover   boyfriend   classmate   Half-n-half Clue