A kindergarten girl watching herself become a cool first-grader is exactly as pure as it sounds, no irony, no winking at adults, just genuine magic in the smallest transformation. The show trusts that growing up one grade is legitimately worth celebrating. Hatena Yousei became a moe icon because she radiates something most anime characters are too self-conscious to even attempt: actual warmth without performance.

Released in 2008 as a single-episode OVA, this short comedy was produced to promote the Shinkenzemi study course for elementary school pupils. Although its intended audience was kindergarten-age children, and copies went out to homes around Japan by direct mail, its character Hatena Yousei drew a sizable following online and became a favorite among fans of moe characters.