Games like Monster Girl Therapy
Games like Monster Girl Therapy include To the Moon, Until Then, LoveChoice, Coffee Talk, and Undertale. We matched them by the tags players give Monster Girl Therapy on Steam (Interactive Fiction, Wholesome, Story Rich, Romance, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

To the Moon
Shared: Story Rich · Interactive Fiction · Pixel Graphics

Until Then
Shared: Interactive Fiction · Story Rich · Pixel Graphics

LoveChoice
Shared: Romance · Story Rich · Choices Matter

Coffee Talk
Shared: Pixel Graphics · Interactive Fiction · Story Rich

Undertale
Shared: Story Rich · Choices Matter · Pixel Graphics

Love Is All Around
Shared: Romance · Dating Sim · Interactive Fiction

Finding Paradise
Shared: Story Rich · Pixel Graphics · Interactive Fiction

I Wani Hug that Gator!
Shared: Story Rich · Romance · Interactive Fiction

The Hungry Lamb: Traveling in the Late Ming Dynasty
Shared: Interactive Fiction · Story Rich · Visual Novel

Slay the Princess — The Pristine Cut
Shared: Story Rich · Choices Matter · Romance

Otaku's Adventure
Shared: Story Rich · Dating Sim · Funny

DELTARUNE
Shared: Story Rich · Pixel Graphics · Funny

Refind Self: The Personality Test Game
Shared: Interactive Fiction · Story Rich · Pixel Graphics

Knowledge, or know Lady
Shared: Romance · Dating Sim · Interactive Fiction

Baldur's Gate 3
Shared: Story Rich · Choices Matter · Romance

OneShot
Shared: Story Rich · Pixel Graphics · Choices Matter

The Cosmic Wheel Sisterhood
Shared: Interactive Fiction · Story Rich · Choices Matter

Roadwarden
Shared: Interactive Fiction · Pixel Graphics · Story Rich

BAD END THEATER
Shared: Story Rich · Pixel Graphics · Choices Matter

ATRI -My Dear Moments-
Shared: Story Rich · Romance · Visual Novel

Coffee Talk Episode 2: Hibiscus & Butterfly
Shared: Interactive Fiction · Pixel Graphics · Dialogue Heavy

The Three Kingdoms: Rebirth
Shared: Romance · Interactive Fiction · Dating Sim

Dispatch
Shared: Story Rich · Choices Matter · Romance

风信楼
Shared: Interactive Fiction · Choices Matter · Story Rich