Happy End no Kyuuseishu

Nao, a college student, is a passionate artist who creates indie erotic manga. After a grueling deadline, he discovers a mysterious, sentient tentacle that introduces itself and enters his room. As Nao naps, the tentacle unexpectedly begins to suck on his genital area, consuming his semen. Upon waking, Nao decides to keep the tentacle, which he names Wiggle-michi, as a drawing assistant and inspiration for his manga. However, this decision is met with dismay by Yasu, Nao's younger colleague, who is not only shocked by the new situation but also harbors a secret crush on Nao. As Wiggle-michi requires regular feeding, Yasu is tasked with assisting Nao in this unusual task, potentially igniting a spark between the two men. Will the sentient tentacle's presence serve as a catalyst for romance, or will it remain a mere tool for Nao's creative pursuits? The story unfolds with an added chapter.