OVA
Description
Rin Tin Tin is a German Shepherd dog living at the Tokorozawa family's pet shop. He possesses human-level intelligence and cognitive abilities, allowing him to comprehend complex situations and display behaviors unusual for an animal.

He develops an intense fixation on Chika Tokorozawa, the pet shop owners' daughter. Rin Tin Tin constantly follows Chika, including to her school, and watches her while she sleeps, demonstrating protective yet obsessive tendencies. This attachment surpasses typical loyalty, evolving into romantic and carnal desire for Chika. He frequently experiences lustful thoughts about her, accompanied by visible physical reactions like blushing.

Members of Chika's community, including friends, neighbors, and classmates, recognize Rin Tin Tin's sexual attraction to her and discuss it openly behind her back. Chika herself remains unaware, misinterpreting his persistent presence as protective instinct rather than romantic pursuit. Consequently, Rin Tin Tin's attempts to express his feelings are consistently misunderstood or ignored by her.

Rin Tin Tin actively disrupts Chika's interactions with human suitors, exhibiting jealousy towards the men she engages with romantically. His actions include physically intervening during her encounters and showing visible frustration or aggression towards perceived rivals. Despite these efforts, his attempts to initiate a romantic or sexual relationship with Chika are consistently thwarted, either by her obliviousness or external intervention.

A teacher at Chika's school identifies the inappropriate nature of Rin Tin Tin's fixation and actively works to prevent him from getting close to her. This opposition creates conflict as Rin Tin Tin continues his pursuit while facing this obstacle.

The character exhibits territorial behavior over Chika, perceiving himself as her rightful companion and reacting possessively when others show interest. This possessiveness extends to voyeuristic tendencies, observing intimate moments between Chika and her human partners. His depiction is limited to the original 1992 OVA media.