diff --git a/youmubot-db/src/lib.rs b/youmubot-db/src/lib.rs
index ccf8576..974fc60 100644
--- a/youmubot-db/src/lib.rs
+++ b/youmubot-db/src/lib.rs
@@ -64,3 +64,14 @@ where
         (*self).0.borrow_data_mut()
     }
 }
+
+impl<T> Drop for DBWriteGuard<T>
+where
+    T: Send + Sync + Clone + std::fmt::Debug + Serialize + DeserializeOwned,
+{
+    fn drop(&mut self) {
+        if let Err(e) = self.0.save() {
+            dbg!(e);
+        }
+    }
+}
diff --git a/youmubot-osu/src/discord/embeds.rs b/youmubot-osu/src/discord/embeds.rs
index d2318a7..4e1b39f 100644
--- a/youmubot-osu/src/discord/embeds.rs
+++ b/youmubot-osu/src/discord/embeds.rs
@@ -79,7 +79,7 @@ pub fn beatmap_embed<'a>(b: &'_ Beatmap, m: Mode, c: &'a mut CreateEmbed) -> &'a
                     link, link
                 )
             })
-            .push_line(b.beatmapset_link())
+            .push_line(format!(" [[Beatmapset]]({})", b.beatmapset_link()))
             .push_line(&b.approval)
             .push("Language: ")
             .push_bold(&b.language)
diff --git a/youmubot/Cargo.toml b/youmubot/Cargo.toml
index da96075..5d5469a 100644
--- a/youmubot/Cargo.toml
+++ b/youmubot/Cargo.toml
@@ -5,12 +5,16 @@ authors = ["Natsu Kagami <natsukagami@gmail.com>"]
 edition = "2018"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[features]
+default = ["core", "osu"]
+core = []
+osu = ["youmubot-osu"]
 
 [dependencies]
 serenity = "0.8"
 dotenv = "0.15"
-youmubot-osu = { path = "../youmubot-osu" }
 youmubot-db = { path = "../youmubot-db" }
 youmubot-prelude = { path = "../youmubot-prelude" }
 youmubot-core = { path = "../youmubot-core" }
+youmubot-osu = { path = "../youmubot-osu", optional = true }
 
diff --git a/youmubot/src/main.rs b/youmubot/src/main.rs
index dadc921..54e765b 100644
--- a/youmubot/src/main.rs
+++ b/youmubot/src/main.rs
@@ -4,12 +4,17 @@ use serenity::{
     framework::standard::{DispatchError, StandardFramework},
     model::{channel::Message, gateway},
 };
-use youmubot_osu::discord::{setup as setup_osu, OSU_GROUP};
 use youmubot_prelude::*;
 
-const MESSAGE_HOOKS: [fn(&mut Context, &Message) -> (); 1] = [youmubot_osu::discord::hook];
+struct Handler {
+    hooks: Vec<fn(&mut Context, &Message) -> ()>,
+}
 
-struct Handler;
+impl Handler {
+    fn new() -> Handler {
+        Handler { hooks: vec![] }
+    }
+}
 
 impl EventHandler for Handler {
     fn ready(&self, _: Context, ready: gateway::Ready) {
@@ -17,7 +22,8 @@ impl EventHandler for Handler {
     }
 
     fn message(&self, mut ctx: Context, message: Message) {
-        MESSAGE_HOOKS.iter().for_each(|f| f(&mut ctx, &message));
+        println!("{:?}", message);
+        self.hooks.iter().for_each(|f| f(&mut ctx, &message));
     }
 }
 
@@ -27,12 +33,17 @@ fn main() {
         println!("Loaded dotenv from {:?}", path);
     }
 
+    let mut handler = Handler::new();
+    // Set up hooks
+    #[cfg(feature = "osu")]
+    handler.hooks.push(youmubot_osu::discord::hook);
+
     // Sets up a client
     let mut client = {
         // Collect the token
         let token = var("TOKEN").expect("Please set TOKEN as the Discord Bot's token to be used.");
         // Attempt to connect and set up a framework
-        Client::new(token, Handler).expect("Cannot connect")
+        Client::new(token, handler).expect("Cannot connect")
     };
 
     // Set up base framework
@@ -49,11 +60,20 @@ fn main() {
             });
         youmubot_prelude::setup::setup_prelude(&db_path, &mut data, &mut fw);
         // Setup core
+        #[cfg(feature = "core")]
         youmubot_core::setup(&db_path, &client, &mut data).expect("Setup db should succeed");
         // osu!
-        setup_osu(&db_path, &client, &mut data).expect("osu! is initialized");
+        #[cfg(feature = "osu")]
+        youmubot_osu::discord::setup(&db_path, &client, &mut data).expect("osu! is initialized");
     }
 
+    #[cfg(feature = "core")]
+    println!("Core enabled.");
+    #[cfg(feature = "osu")]
+    println!("osu! enabled.");
+
+    client.with_framework(fw);
+
     println!("Starting...");
     if let Err(v) = client.start() {
         panic!(v)
@@ -72,10 +92,10 @@ fn setup_framework(client: &Client) -> StandardFramework {
         .expect("Should be able to get app info")
         .owner;
 
-    StandardFramework::new()
+    let fw =    StandardFramework::new()
             .configure(|c| {
                 c.with_whitespace(false)
-                    .prefix("y!")
+                    .prefix(&var("PREFIX").unwrap_or("y!".to_owned()))
                     .delimiters(vec![" / ", "/ ", " /", "/"])
                     .owners([owner.id].iter().cloned().collect())
             })
@@ -126,10 +146,14 @@ fn setup_framework(client: &Client) -> StandardFramework {
             .bucket("images", |c| c.time_span(60).limit(2))
             .bucket("community", |c| {
                 c.delay(30).time_span(30).limit(1)
-            })
-            // groups here
-            .group(&youmubot_core::ADMIN_GROUP)
-            .group(&youmubot_core::FUN_GROUP)
-            .group(&youmubot_core::COMMUNITY_GROUP)
-            .group(&OSU_GROUP)
+            });
+    // groups here
+    #[cfg(feature = "core")]
+    let fw = fw
+        .group(&youmubot_core::ADMIN_GROUP)
+        .group(&youmubot_core::FUN_GROUP)
+        .group(&youmubot_core::COMMUNITY_GROUP);
+    #[cfg(feature = "osu")]
+    let fw = fw.group(&youmubot_osu::discord::OSU_GROUP);
+    fw
 }