DILF Oikawa (Patreon)

"Mate is a traditional drink in some countries in South America, especially in Argentina, Paraguay, Uruguay, Chile, Bolivia and Brazil. The drink, which contains mateine (an analog of caffeine), is made by an infusion of dried leaves of yerba mate"

some people drink it bitter, but others add milk, or sugar, or both. I HC that Oikawa drinks it super sweet 

Akaashi is next!