Small environments for embedded scripting allow software to evaluate logic dynamically on resource-constrained platforms. In this paper, we present Stak Scheme, the tiny R7RS-small Scheme implementation. The whole interpreter of Stak Scheme contains no more than 10 KLOC as its core parts are composed of a bytecode compiler written in 1.6 KLOC of Scheme and a virtual machine written in 1.5 KLOC of Rust. Despite its minimal and naive design, Stak Scheme supports all major language features of the R7RS-small standard including but not limited to the library system, hygienic macros with syntax-rules, continuations, exception handling, and the fully-featured eval procedure. Our bytecode encoding and decoding algorithms convert code and data in bytecode uniformly between its in-memory graph format and serialized byte sequences. Our evaluation proves that the implementation of Stak Scheme is compact compared to the prior work of a small R7RS-small implementation whereas its performance is still comparable with other implementations of Scheme and the other scripting languages despite its minimal design.