Quick answer — Eiki Etou worked on An Observation Log of My Fiancée Who Calls Herself a Villainess (Director of Photography), Hozuki’s Coolheadedness 2 (Director of Photography), Hozuki’s Coolheadedness 2: Part II (Director of Photography) and 5 more anime.
Eiki Etou worked on An Observation Log of My Fiancée Who Calls Herself a Villainess (Director of Photography), Hozuki’s Coolheadedness 2 (Director of Photography), Hozuki’s Coolheadedness 2: Part II (Director of Photography), My Next Life as a Villainess: All Routes Lead to Doom! (Director of Photography), Tying the Knot with an Amagami Sister (Director of Photography), My Next Life as a Villainess: All Routes Lead to Doom! Movie (Director of Photography), My Next Life as a Villainess: All Routes Lead to Doom! X (Director of Photography), Level 1 Demon Lord and One Room Hero (Director of Photography).