L*st Apartment, also known as 恋欲公寓（H1V1）, is a Chinese web novel that falls under the genres of adult, mature, romance, and smut. The story revolves around a beautiful female lead and a handsome male lead, featuring R-18 content. The novel's intriguing plot and engaging characters make it a popular choice for readers looking for a steamy and romantic read set in an apartment setting.