"I drink alcohol every night."
Doulingo remembers when he used to drink to be happy. Now he drinks in the hope that the next one will destroy his liver, so he can finally die.
That third Kanji, 御, is the お or ご you see before some nouns to make it formal. In this case, it's お (おさけ).
Yes, the honorary お before さけ often marks it as sake. But they can both mean alcohol :)
And if you want to be explicit, sake (as we call Japanese rice wine in English) is simply 日本酒 (にほんしゅ/nihonshu), literally "Japanese alcohol."
You can see a bit more in-depth discussion in this forum post, where the subtlety of "o-sake" is also discussed: