Tatsumi lives a tired life because of his work at a sketchy company. His only reason for living and his passion is reptiles. Kotani lives next door to Tatsumi and unexpectedly one night after a misunderstanding ends up helping him create a channel to talk about reptiles.
Tonari no Hachuurui-kun is a completed manga by Yamamoto Mato, first published in 2022. It blends romance and slice of life. You can read all 15 available chapters of Tonari no Hachuurui-kun online for free on MangaPulse; the newest is Chapter 12.5, added 2026-06-04. The series is finished, so you can read it from start to end in one go.