[hiiro_no_kenkyuushitsu_(hitoi)]_ochiba_nikki_-... -

The "solid text" portion of your query usually refers to a specific digital archive format or a transcription of the dialogue/narrative within the book. These works often lean toward:

: Usually Japanese, though English scanlations exist in various archives. [Hiiro_no_Kenkyuushitsu_(Hitoi)]_Ochiba_Nikki_-...

: Hitoi is known for a softer, often slightly moody art style. The "solid text" portion of your query usually