I'm a Sleep Aid Streamer in a Horror Game

Female Lead Pretending to Be Melancholic, Transported Into a Horror World, With a Love Interest

I once read a book where the heroine transmigrated into an instance world and acted all gloomy. The setting was Tokyo, Japan. On the first night she ran into Sadako and gave her bangs. On the second night she met a gloomy male ghost and changed him into a suit.