My Cat Loki Vol 1

From the TOKYOPOP Classics edition

As a child, Ameya had always considered his cat more a sibling than a pet. As the years went by, their bond grew ever tighter. But the day his feline “brother” died was the day Ameya withdrew from the world. Several years later, Ameya encounters a drenched stray cat in the park. Little does he know what fate has in store for him...

Source: Penguin Random House API