Sasaki to Pii-chan - Episode 1 - Yandere Otonari-san

Sasaki's teenage female neighbor saw him talk to a strange woman in the parking lot and developed yandere eyes.

Middle-aged Sasaki had been an office worker for too long without climbing the management ranks. Besides his interactions at work, he only talks to his beleaguered next-door neighbor, a high school girl, and the convenience store clerks. All that changed when he could no longer contain his urges for cute pet antics and brought home a Java finch from the pet store. Then it, Piercarlo the Star Sage from Another World, spoke to him and granted him powers! All he wants in exchange is a medium-rare chateaubriand steak.

The reincarnated Piercarlo, dubbed Pii-chan, still had all his magical abilities. But the frail bird body he now had could not withstand him using his most effective spells. Instead, he made Sasaki travel between worlds to sell goods so he could afford that premium cut of beef! Pii-chan also taught Sasaki some magic spells, which backfired on Sasaki's plan to retire to a slow life in another world. He saved the life of a woman under attack by supernatural means and found himself involved with a secretive government agency in charge of managing rogue psychics! Now, he works for the group he would have most wanted to avoid as he traveled between parallel worlds. It only gets more complicated after this, Sasaki!