Logic Masters Deutschland e.V.

Rules:
U-Bahn: Draw a totally connected loop network through the centers of some cells, which may branch or turn, but may not have any dead ends. A clue outside the grid indicates how many times the corresponding line shape (i.e. a cross, branch, straight line, or turn) appears in the corresponding row or column, irrespective of the line shape's rotation.
Buddies: Every single network cell (so ignoring empty cells) must have at least one orthogonally adjacent cell that has the same shape as itself. (turn, straight, branch or cross)

Links:
You can solve the puzzle in either Penpa+ or in the CTC Software.