Shingeki no Eroko-san
Alternative title: Attack on Eroko ~Weird Older Sister Wants to Get Closer to High School Boys~, Shingeki no Eroko-san ~Hen na Oneesan wa Danshikousei to Nakayoku Naritai~
Story Overview
Shindou Eroko, a glasses, enormous breasted magnificence, gotten a new line of work as a jack of all trades for the Amaguri Handyman administration after her NEET life reaches a conclusion as her reserve funds ran out. She promptly succumbs to her associate Hoshi-kun on their first day cooperating, however there's an issue: Hoshi-kun is a secondary school kid, while Eruko is a 27 years of age onee-san who experiences difficulty differentiating her dreams from the real world. She winds up continually conspiring to draw near to Hoshi-kun to transform a large number of her hallucinations into the real world...