In the context of Lition’s work, "Sisterly Duties" explores the intersection of family dynamics and adult fantasy. The series often revolves around a protagonist (frequently featuring futanari characters) interacting with sisters or other female family members.
FUTA runs a trimester system (or a very compressed semester) for many engineering courses. The pressure is relentless. A senior sister is not just a mentor; she becomes a co-student. It is common to see a 400-level female student teaching a 200-level junior how to use AutoCAD or MATLAB at 2 AM, not out of kindness, but out of a learned duty that feels mandatory. Sisterly Duties -FUTA- -Lition-