The 'Reiko's Trap Harem' meme template originates from the manga series Call of the Night (Yofukashi no Uta), specifically featuring the character Reiko. The image portrays Reiko in a central position surrounded by several feminine-looking male characters, a visual trope often discussed in anime subcultures. It became a popular reaction image and exploitable template on sites like Reddit and Twitter, where users label Reiko as themselves and the surrounding characters as their various niche hobbies, specific tastes, or overwhelming responsibilities. The meme effectively captures the feeling of being 'surrounded' by things one enjoys or has gathered, often with a humorous or slightly chaotic undertone typical of modern internet anime culture.