Based on the title (Niina's Erotic Weekdays ~Touch Secretly on the Weekend!~), this is a visual novel/doujin game developed by Harinezumi Koubou .
As the saying goes, "A secret's secret until it's not." For Niina, having someone to share her secret with lightened her heart and perhaps opened up new possibilities in her creative journey. niina no ero youbi shuumatsu wa himitsu ni touc work
Detailed information about this work can be found on databases like the Visual Novel Database (VNDB) 19 Sept 2025 — "Niina no Ero Youbi ~Shuumatsu wa Himitsu ni Touch
: It is categorized as a visual novel, a genre of interactive fiction that uses static graphics, typically with anime-style art, and branching narratives. Release Information : The title was developed by the circle Harinezumi Koubou. General Information : Digital visual novel. Primary Themes "Work" clearly refers to labor or a task