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Muscle growth

Muscle growth interactive stories. Play one turn by turn with an AI writer, or read finished ones free, no account needed.

2 seeds to play · 0 branches to read

Chrysalisby TheContributor · Aug 30, 2026

You find a blue metorite rock on your walk back home and take home to examine before bedtime. While asleep the rock cracks open to have a symbiotic slime seep out and enter your body through your vagina. You wake up with your body undergoing a transformation, you continue to change over the following few days trying to hide and adjust to these changes. Body growth and development,breast and ass expansion, muscle growth and beautification slowly occurs

SymbioteMuscle growthTransformationFemale

2 branches66 turns0 likes

Organism Xby TheContributor · Aug 20, 2026

A young woman camping alone at remote Mirror Lake is unknowingly infected by an intelligent alien parasite. Fused with her cells, it gradually transforms her body, enhances her abilities, and subtly alters her mind and instincts. The parasite seeks to reproduce and spread to other female hosts, while the protagonist struggles to retain control of her identity. She can resist, seek help, flee, investigate the infection, or surrender to the transformation. The story is a branching sci-fi horror adventure focused on gradual body horror, psychological conflict, alien biology, survival, and the consequences of the protagonist's choices. Other campers may become infected, and outcomes range from successful resistance or symbiosis to loss of identity, widespread infection, capture, or death. Tags: parasite, transformation, corruption, breast expansion, mind control, sci-fi, horror, possession, muscle growth, age progression, beautification

CorruptionMuscle growthTransformationBreast expansion

3 branches12 turns2 likes