無經驗な私は氣味を惡がりながらも、にや／＼してゐた。
translation
Inexperienced, I grinned even though I was feeling creeped out.
kanji (pronunciations & definitions)
| 私: I (わたし), me, I (あたくし), I (あたし), I (アタシ) | 惡: evil (あく), wickedness, (role of) the villain (in theatre, etc.), the bad guy |