A crack alone won't fix text corruption. Even with a cracked version, you must run the game using or set your system locale to Japanese (Shift-JIS). Without this, the text will appear as garbled mojibake (e.g., ã‚ã‚Œã¯æ—¥æœ¬èªž ).
If you are searching for a free copy of the game without paying—understand that you are hurting a niche industry that already struggles against piracy. Boku to Kanojo no Kojin Lesson 2 is often available on sale for less than $15 on DLsite. Boku to Kanojo no Kojin Lesson 2 -Crack-