Investor & Builder

Building and investing
with Korean founders.

CEO at Tetra · GP at 조약돌개인투자조합.
Helping early-stage startups launch, grow, and fundraise —
sharing hands-on perspectives from the Korean ecosystem.

Recent Writing

AI Card News Generator (OpenAI API key required)

Brutally hard startup RPG (3.4% clear rate)

Content performance analysis, post grades, weekly reports

Claude & Gemini Prompt Generator

Equity Dilution Simulator

SAFE / Convertible Note Calculator

Stock Option Value Calculator