Kagaku to Mahou no Kasou Sekai Vol. 3

A few days after Sanae's debut celebration, Akira met Wave, a spellcaster also in pursuit of Meru.
Akira joined him, though he didn't much like Wave pointing out his magical inadequacies.
At the river in the forest, a silver-haired girl suddenly came at Akira with Wave in plain sight.

A fantasy visual novel game set in reality and virtual reality.

The story continues.

[From DLsite English]