Doki Doki Literature Club! New Heading (DDLC:NH for short) is a fan-made modification of the popular visual novel Doki Doki Literature Club! Modification is produced by liledix⁴ and Xatiman.
This modification introduces Lisa, a character who also appears in Bombs vs. Sleepwalkers franchise, making her a crossover character. In the lore, Lisa’s appearance in the first BvS game happened after events of DDLC:NH.