explanatory notes (at the start of a book); introductory remarks; usage guide (e.g. of a dictionary); legend (on maps, drawings, etc.)
class; heading; group; category
pain of love; love troubles
slightly bitter (taste); bittersweet (memory, experience, etc.)
sweetness; sugary taste; sweets; dessert; cake
deer (esp. the sika deer, Cervus nippon); cervid
to burn; to scorch; to singe; to char
extramarital sex; affair; fooling around; infidelity; wantonness; unfaithfulness
to compose; to write; to author
plotting (of maps); mapping; compilation
hot and cold; summer and winter
valley; ravine; gorge; canyon
to follow; to pursue; to die right after a loved one; to kill oneself after the death of a loved one; to follow an example set by earlier generations (or one's master, etc.)
hunting; shooting; game; quarry
to stray from the right path; to go wrong; to go off the rails; to turn delinquent
in range; within the limits (of ...); within (a) range
physical; fleshly; corporal
grinding; polishing; refining (a skill, knowledge, etc.); applying oneself (to study); disciplining oneself
acknowledgement; acknowledgment; recognition; cognition
very high; high up; aloft; only; merely; just
timidly; nervously; with nervous diffidence; trembling with fear
to creep up to; to approach stealthily; to steal up; to draw near unnoticed
joining (a club, organization, etc.); becoming a member; entry; admission; subscription; affiliation
tangle; entanglement; snarl; complication; difficulties; trouble
pressure; pressure (e.g. political); arm-twisting
strong-willed; volitional
intimacy; friendship; friendly relations
complete devotion; body and soul; one's best
has never (done, occurred); there has never been an instance (where); there is no precedent (for)
(coming to an) agreement; consent; mutual understanding; accord; consensus
ancient and modern times; all ages; past and present
to insult; to say something insulting about; to bad-mouth
man; male; masculine gender
pederasty; boy love; shōnen-ai (manga subgenre depicting romantic relationships between boys); boys' love
young; innocent; childlike
to wipe thoroughly; to polish well
extreme passion; wild enthusiasm